20171031

Physics quiz archive: energy conservation, momentum conservation

Physics 205A Quiz 4, fall semester 2017
Cuesta College, San Luis Obispo, CA
Sections 70854, 70855, version 1
Exam code: quiz04w33N



Sections 70854, 70855 results
0- 6 :  
7-12 :   ***** [low = 9]
13-18 :   ****************
19-24 :   **************** [mean = 20.8 +/- 5.7]
25-30 :   *********** [high = 30]

Online reading assignment: fusion, nebulae, star cluster ages (NC campus)

Astronomy 210, fall semester 2017
Cuesta College, San Luis Obispo, CA

Students have a weekly online reading assignment (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or asking (anonymous) questions or making (anonymous) comments. Full credit is given for completing the online reading assignment before next week's lecture, regardless if whether their answers are correct/incorrect. Selected results/questions/comments are addressed by the instructor at the start of the following lecture.

The following questions were asked on reading textbook chapters and previewing presentations on fusion, nebulae, and star cluster ages.


Selected/edited responses are given below.

Describe something you found interesting from the assigned textbook reading or presentation preview, and explain why this was personally interesting for you.
"I found the S-B law to be interesting because it is used to measure the brightness of a star even though it's light years away."

"I found the 'cheerleader model' to be very interesting and fascinating. It makes sense to understand tiny molecules doing this, but people?"

"Stars have a lot of shell layers and they all have pressure that has to be right so the star can be stable."

"The reason fusion takes place only in the core of the sun is because that is where the pressure is the greatest. The explanation for this was super clear, and that was great because I felt as though it could be really confusing. It was also interesting to connect this concept with the idea of diving in a pool, because I'm sure everyone has experienced swimming too deep and having an earache as a result as some point in time."

"The center of the sun is 100 times as dense as water but at the bottom of its photosphere it is 3,400 times less dense then Earth's atmosphere at sea level."

"I loved the section on fusion. Specifically that when there is little pressure and low temp. there is little to no fusion."

"Fusion makes helium from hydrogen."

"I think it's really interesting how mass size and luminosity all work together and correlate into the H-R diagram, but I also find it interesting that there are stars that don't fit into this correlation."

"Something I found very interesting to me are the kinds of nebulae that are depicted. I find it very compelling and crazy to understand the amount of gas and dust there is to produce a nebula."

"I found the different colors of the nebula to be very interesting, because I've always been curious as to why they are different colors."

"How different nebulae get their distinct colors, and that there are only certain colors available for nebulae. I've seen green and orange colored ones online, but those are all Photoshopped or altered through filters because nebulae can only produce red, pink/purple, blue, brown, or black shades."

"I found that the nebulae were interesting because now I know what the colors really mean when I'm looking at pictures of space. (Ex: I find a picture of mainly blue clusters of stars and can identify that it's a reflection nebulae with small dust particles.)"

"I like the the 'house party' reference to the lifetime of certain mass stars. I was wondering how guests at a house party would tie in to stars but its so very true that there are those three types of people that show up to a party and eventually leave at a certain time."

"The formation of stars and how a collapsing cloud never forms a single star."

Describe something you found confusing from the assigned textbook reading or presentation preview, and explain why this was personally confusing for you.
"I am still a little confused on the classifications of stars using the H-R diagram. I have trouble with the labeling of each letter."

"I found the H-R diagram to be kind of confusing. This might be due to the fact that I was out of class sick last Thursday when we first went over it, but I could use a few clarifications. I also don't completely understand the concept of outliers on the diagram (ie: supergiants, white dwarfs, etc.) and how all of these are classified as not necessarily existing on the diagram even though they are all so different."

"Why don't white dwarfs, giants, and super giants have any correlation between mass and luminosity? is there a scientific explanation for this?"

"How do the nebulae form into stars? I don't think I understand the exact process of how they all come together. Does fusion start before the star and gravity kind of pulls it all together?"

"I did not quite understand how hydrogen atoms fuse to make heavier atoms."

"Fusion was confusing."

"I was a bit confused on how the H-R diagram of stars worked and also on the three different types of nebulas."

"I found the house party model to be confusing of how you apply that to finding out what kind of stars they are according to the diagram."

"Star cluster age was a bit confusing to me."

"How a shock wave triggers star formation."

Rank the luminosities of these main-sequence stars (1 = brightest, 3 = dimmest). (There are no ties.)
(Only correct responses shown.)
Massive: brightest luminosity [100%]
Medium-mass (sunlike): medium luminosity [100%]
Low mass (red dwarf): dimmest luminosity [100%]

Rank the fusion rates of these main-sequence stars (1 = fastest, 3 = slowest). (There are no ties.)
(Only correct responses shown.)
Massive: fastest fusion rate [87%]
Medium-mass (sunlike): medium fusion rate [100%]
Low mass (red dwarf): slowest fusion rate [87%]

Fusion requires high temperatures in order for nuclei to move quickly enough to:
break heavy elements apart.  ***** [5]
create convection currents.  * [1]
overcome gravity.  * [1]
overcome repulsion.  *************** [15]
(Unsure/guessing/lost/help!)  * [1]

Briefly explain why "cold fusion" (producing energy from hydrogen fusion at room temperature) would be implausible.
"Since hydrogen protons are of the same charge, they naturally repel one another. This means that when they are not being squeezed together by high pressure/heat, they will not join together and fusion will not take place."

"'Cold fusion' from hydrogen would be implausible because a hydrogen nucleus is actually just a proton and since protons are all positively charged they must undergo immense pressure and temperature to combat repulsion. If there is not enough temperature that would make the protons move faster they would in turn not have enough pressure to combat repulsion and could not produce energy."

"Hydrogen would move too slowly under low temperatures, therefore they won't collide with each other very much, or not at all."

"Since the protons are positively charged, they will repulse each other."

"I don't exactly understand this."

Match the three different types of nebulae with their colors.
(Only correct responses shown.)
Emission: pink [91%]
Reflection: blue [91%]
Dark: brown/black [100%]

Match the three different types of nebulae with their composition.
(Only correct responses shown.)
Emission: hydrogen [96%]
Reflection: small dust particles [91%]
Dark: large dust particles [91%]

Rank the lifetimes of these main-sequence stars (1 = shortest, 3 = longest). (There are no ties.)
(Only correct responses shown.)
Massive: shortest main-sequence lifetime [70%]
Medium-mass (sunlike): medium main-sequence lifetime [96%]
Low mass (red dwarf): longest main-sequence lifetime [74%]

If there was an open invitation to a house party (no specific time given), when would you show up?
Early, or on time.  * [1]
When the most people should be there.  ******************* [19]
After most everyone has left.  *** [3]

Ask the instructor an anonymous question, or make a comment. Selected questions/comments may be discussed in class.
"I'm having trouble connecting a lot of the book with the questions and presentations. It usually makes more sense looking at the presentations then reading the book. I also have been having trouble with the H-R Diagram because I'm not sure how to find information with the OBAFGKM letters. I think I'm just slow with this information and need a review."

"Could you please go over the H-R diagram again? I'm having trouble understanding how to find stuff like M5. I'm probably just a bit slow, but it'd really help. Thanks!"

"Review of the H-R diagram and why certain stars don't fit in would be helpful."

"If you could please go over emission, reflection and dark nebulae."

"Can you go over the whole turn-off point thing? How is it determined where the turn-off point is located and how do you determine if a star in the cluster is coming or going?"

"Will there be any more extra credit similar to what was offered last week?" (Yes.)

"How does the house party model apply to a star cluster's age?"

"House parties are lame, man."

"When would you show up to the house party?"

"How important is punctuality in astronomy?"

"Do you analyze the weekly reading assignments after everyone has completed it or simply after midnight? Is it therefore annoying when students finish the assignments right before midnight?" (I compile all the student responses to the reading assignment early in the morning before class, but I do peek at some of the more interesting comments before the midnight deadline. It is interesting to see how close to midnight some students get when submitting their responses.)

20171030

Online reading assignment: rotational dynamics

Physics 205A, fall semester 2017
Cuesta College, San Luis Obispo, CA

Students have a bi-weekly online reading assignment (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or asking (anonymous) questions or making (anonymous) comments. Full credit is given for completing the online reading assignment before next week's lecture, regardless if whether their answers are correct/incorrect. Selected results/questions/comments are addressed by the instructor at the start of the following lecture.

The following questions were asked on reading textbook chapters and previewing a presentation on rotational dynamics.


Selected/edited responses are given below.

Describe what you understand from the assigned textbook reading or presentation preview. Your description (2-3 sentences) should specifically demonstrate your level of understanding.
"Angular speed = angular displacement/time. The distance a car moves is equal to the arc length the tire rolls."

"How to calculate the KErot and all that. Its a little unclear but I think I understand that the most."

"When an object has both rotational kinetic energy and translational kinetic energy."

"Rotational kinetic energy is the energy of rotational motion. The faster an object rotates, the more KErot energy it has. Objects can have both rotational kinetic energy and translational kinetic energy."

"There is a lot of information. I understand the difference between translational and rotational speed, and the relationship between mass, and rotational inertia, and that all of these factors allow for different equations that calculate inertias for different objects. The transfer/balance equations are straightforward."

"I will be honest, I spent today studying for the quiz on Monday and am scared learning new material right now will interfere with the material I am trying to make sure I know for tomorrow. I did attempt the homework though."

"Honestly I didn't understand anything from the reading."

Describe what you found confusing from the assigned textbook reading or presentation preview. Your description (2-3 sentences) should specifically identify the concept(s) that you do not understand.
"Most of this is very confusing. A lot of new stuff at once is hard, especially when trying to study for a quiz that doesn't involve this new material."

"Most of this, actually."

"The difference between rotational kinetic energy and translational kinetic energy."

"I understand that rotational kinetic energy and translational kinetic energy are different. However, apart from that, I think I might need a better understanding on the differences between the two."

"I need more explanation on angular speed. And the gravitational potential energy, the translational kinetic energy, and the rotational kinetic energy."

"Rolling without slipping--I would appreciate going over this in class."

"KEtr and KErot is little confusing and it would be nice to go over it in class."

"Moments of inertia. I do not know where to begin for applications."

"I understand this section."

What is the SI (Système International) unit for rotational kinetic energy?
"kg·m2/s2."

"J, joules."

"rad/s?"

Describe an object that only has rotational kinetic energy, and no translational kinetic energy.
"Anemometer."

"Spin bike."

"Carousel ride."

"A record spinning."

"A spinning basketball on someone's finger."

"Windmill."

"House fan."

"Hamster wheel; Ferris wheel."

"Doorknob."

Describe an object that has both translational kinetic energy and rotational kinetic energy.
"Bicycle rolling down a hill."

A unicycle."

"A tire rolling down and in contact with a road."

From starting at the top of the ramp to the bottom of the ramp, indicate the changes in each of the energy forms of the tire.
(Only correct responses shown.)
Gravitational potential energy: decreases [84%]
Translational kinetic energy: increases [86%]
Rotational kinetic energy: increases [79%]

From starting at the top of the ramp to the bottom of the ramp, the energy form that experienced the greatest amount of change (increase or decrease) was the tire's:
gravitational potential energy.   ************** [14]
translational kinetic energy.   **** [4]
rotational kinetic energy.   ***** [5]
(There is a tie.)   ********** [10]
(Unsure/lost/guessing/help!)   **** [4]

For the subsequent part of this stunt, from just as it leaves the second ramp to reaching the top of its trajectory, indicate the changes in each of the energy forms of the tire.
(Only correct responses shown.)
Gravitational potential energy: increases [78%]
Translational kinetic energy: decreases [68%]
Rotational kinetic energy: no change [43%]

For the subsequent part of this stunt, from just as it leaves the second ramp to reaching the top of its trajectory, the energy form that experienced the greatest amount of change (increase or decrease) was the tire's:
gravitational potential energy.   ************** [14]
translational kinetic energy.   ****** [6]
rotational kinetic energy.   **** [4]
(There is a tie.)   ****** [6]
(Unsure/lost/guessing/help!)   ******* [7]

Ask the instructor an anonymous question, or make a comment. Selected questions/comments may be discussed in class.
"I found the tire rolling down the mega-ramp oddly satisfying."

"Go over how to find values for KEtr and KErot)."

"Could you use these equations to predict how a certain tire made at different masses would be ideally and most efficient at rolling?" (Yes, we can.)

"If energy can be converted from one form to the other does that mean all energy types should have the same SI unit?" (Yes!)

"I'm going to need a lot of review on this, I'm pretty confused..."

"Need lots of help with this in class!"

"I am desperate! I can't catch up the pace--I understand the content but it takes me forever to do all the exercises, read the book, blog and try to understand the lab beforehand...and I never procrastinate! :( Sad!"

"I need to work on my time management."

20171027

Online reading assignment question: keep, quit, start

Physics 205A, fall semester 2017
Cuesta College, San Luis Obispo, CA

"2017-07 Phys 205A keep"
Waifer X
flic.kr/p/CKvWRN

Wordle.net tag cloud for "keep" resolutions.


"2017-07 Phys 205A quit"
Waifer X
flic.kr/p/YLMc6u

Wordle.net tag cloud for "quit" resolutions.


"2017-07 Phys 205A start"
Waifer X
flic.kr/p/YLMc8o

Wordle.net tag cloud for "start" resolutions.

Students were asked to answer a "keep-quit-start" online reflection (hosted by SurveyMonkey.com) on their studying strategies/pitfalls (Mubayiwa, 2009).
Enter a word or brief phrase that describes what you intend to keep doing to study for this class. Explain your answer to the above question (what you intend to keep doing to study for this class).

Enter a word or brief phrase that describes what you intend to
quit doing to study for this class. Explain your answer to the above question (what you intend to quit doing to study for this class).

Enter a word or brief phrase that describes what you intend to
start doing to study for this class. Explain your answer to the above question (what you intend to start doing to study for this class).
[Word tags have been edited to consolidate related common subjects; student explanations are verbatim.]

Keep word tags:
askquestions
      I intend to keep asking questions and working with those around me to better understand what I am learning in physics. I intend to continue attending every class and absorbing all the information.

everything
      I need to just maintain what I am doing now to get a B, I'll need to increase by 50 points to get an A. Maybe, just maybe. thoroughly get through the homework and show up to ALL classes and get help when needed.
      I need to keep doing my labs and homework
      I just need to keep doing homework and studying
      By this I mean that I will continue to do all of the homework, show up to class, and show up to lab to get as much points as possible.

gotoclass
      I learn the most during class going over the examples and listening to lecture. When I'm at school and in class i am the most focused and am able to learn the best.
      If I didn't go to class on a regular basis I would probably be failing miserably however I've gone everyday and somewhat get the concepts of physics.
      Keep coming to class everyday to stay current.
      I intend to keep coming to class so I don't miss any more in-class points.
      It is very important to attend all classes and helpful to be able to ask questions.
      I so far have attended most of all the lectures and I plan on continuing that.
      I haven't missed a single day of class which I believe is very important for doing well in a course like this. Also studying the concepts multiple times a week also really helps.
      By coming to class it helps me work out problems by using the examples we work on and applying it to homework problems.
      These things (especially taking detailed notes) have been mainly to credit for the success I've had in the class so far.
      I plan to keep going to labs because they further my interest and understanding of the course as a whole.

homework
      Doing the reading assignments and homework problems will prepare me for class discussion and allow me to grasp in class concepts and problem solving skills more efficiently.
      I have done almost every homework assignment and it has kept my grade fairly high, so I assume that it is a smart thing to do.

practiceproblems
      Always making sure I understand what is introduced right away, if not, via example problems.
      I have continued to believe that I need to do more practice problems to really understand the concepts in class. At this point I need to do more focused library work to nail the problems. It is an extremely short class, I shouldn't expect to get mostly everything I need from lecture.
      Reworking the problems presented in class helped me gain a better understanding of the material.
      I normally print and solve all of the blog problems and compare step by step my process with the answer.
      I have noticed that drawing out past examples and in-class problems with classmates as if teaching the material has helped most. This prepares me for the answer planning on tests on quizzes.
      The only way to master the material in ANY course is to familiarize yourself with the concepts and steps necessary to solve problems. This comes from repetition.
      I will keep practicing the homework problems and worksheet problems that are given so that I can keep up with the new concepts and ideas we learn.
      Something I should continue to do is to do the homework problems that are assigned to us. Not only once but multiple times. It is important to solve the problems. Preferably before the beginning of the class, but also after having gone to class it is good to review those same types of problems. It would also help if I started to mark off errors by following the rubric used to grade our exams.

previewing
      I've always previewed all the materials before going to class and that has been helping me a lot.
      It helps immensely to preview the Powerpoint presentations. This really focuses in on what you need us to know and what is the most crucial information; the information from the book can sometimes be overwhelming, so it helps to have the information synthesized by you first.

printouteverything
      I print everything, from the blog contents to twitter, the book, online definitions. It helps me be organized and study contents in order. Also, I label every exercises that I'm not succeeding the first try so I can come back to those later.

review
      Review notes and examples from class. Review homework problems and posted quizzes. And review the blogs, going back and re-reading them really helps me understand things better.
      I plan to continue reviewing prior years quizzes and midterms to succeed in this class. I have found it to be the best way to prepare for a quiz or exam because it shows you a broad overview of the type of problems.

staystrong
      I need to keep staying motivated for the rest of the class in order to achieve the grades I want. It is easy to slack off and get behind and this is something I need to avoid and keep making sure I understand the reading and assignments.
      Trust in myself to be confident in my understanding of physics and continual belief in my ability to achieve.

studydefinitions
      This is what a struggle with, because if I don't know what a symbol means or the definitions for key terms I am completely lost when it comes to problems.

studying
      There is a lot of information in this class and just doing the assignments and showing up to class won't be enough.
      Keep my studying and preparation for quizzes.
      I must keep on trying my hardest to keep up with all of the material and do at least one practice problem per day.

takenotes
      Take good notes during class, from homework/ reading, and review them outside of class.
      I always write down everything on the board while I listen to the explanations to the problems which makes referencing back to the practice problems a lot easier.

tutorsessions
      See a Cal Poly tutor more to learn the material.
      It helped me the most to have a tutor outside of class helping me understand everything.
      I started seeing a tutor that my boyfriend uses for engineering classes and he is able to explain everything to me conceptually in a way that works for me.

worksheets
      I will KEEP pushing to understand worksheet examples because that is the main way I learn in this class other than attendance.
Quit word tags:
makingexcuses
      I have a hard time in flipped classes and physics is a hard class. The way it is presented is more understandable than I make it out to be. The material is online and tutoring is available for me and the fact that the workload unbalances the rest of my workload, I still should be doing better in class.

notparticipating
      This isn't a class where I can just sit back and passively take in material. I need to stop just showing up to class and expecting all of the concepts will simply fall into my lap. With a lot of classes you can certainly have this mentality and receive an A, but not in this one.

notcheckingpoints
      I will QUIT assuming my grade is entered correctly in lab, quit assuming that I am getting the grade I deserve, and instead be diligent with the professor about discrepancies.

notfollowingthrough
      If I continue to follow problems in which I don’t understand the basics of, it is hard for to know what’s going on even though I can do the math.

nothing
      I'm not sure if I need to quit anything. I try to study and review as much as I can.
      I am not doing anything that is preventing me from learning, I love this class and intend to continue doing my best in it.

overthinking
      I tend to over think problems and that has costed me some bad judgement in a problem.
      I am confused about every little differences (abreviations, terms, variations) that the book has over your blog. When I write a summary of the book and a summary of the blog, everything looks different even though it's explaining the same thing. I will only read the book from now on without taking notes from it.
      I need to quit doubting my abilities to succeed. I often overthink things and get overwhelmed with reading if I do not understand it all right away and stress myself out more then I need to.

panicking
      I panicked about learning the info and then I retain nothing.

procrastinating
      Not put off homework and study till the last minute.
      I need to stop procrastinating on post/pre labs.
      I always wait last minute to do other homework from other classes which interrupts studying time I could have for physics.
      I wish to quit stalling on my homework and studying. Overall improve my working morale a bit by being more proactive in my studies.
      I need to quit procrastinating studying for quizzes and midterms
      The sooner I start to study for exams, the better I do on them.
      I need to quit waiting until the last minute to do my homework and reading.
      I end up doing the homework assignments last minute and I don't read the textbook too much which makes me feel like my general understanding of the topics is too basic.
      I have been so busy with my other classes that I have to rush my homework.
      I tend to wait tell the last minute to do the homework assignments. It affects the amount of time I get to really digest the material we are supposed to learn.
      I always procrastinate on doing the homework and it always puts me so behind.
      I need to work harder on doing problems out of the book and really reading the sections that are assigned. It helps doing repetition of these problems.
      I've been very procrastinating on the homework, I've actually been loooking over the chapters, it's just I feel like I'm repeating myself a lot and I get confused on the questions and I hate to guess but to be fully honest I've done it before on the earlier homework questions.
      I need to stop putting off homework until the last possible minute.
      I am very good at procrastinating and I want to stop and be better prepared so that in the end I will have less stress.
      Waiting until days after lecture to work on practice problems isn't helpful. If you want to succeed, it usually involves being proactive about retaining information from ten minutes ago, rather than information from 10 days ago.
      I tend to not do all the suggested work on time. Instead i will wait until the last minute to do some things and it has become a bad habit of mine. it would be good to stop procrastinating and instead start doing my assignments on time before lecture. this includes the textbook reading as well ass all the homework problems.
      I typically wait until the last minute to do many things for this class and I think that I should start doing assignments much earlier.
      I really need to quit procrastinating. I sum a lot of it up to work and school making me feel tired, but that isn't a good enough excuse. I really need to buckle down and get it done.
      I tend to think I must do the assignments on Sunday or Tuesday after I put my kids to sleep, but I fall asleep without completing them about half the time. I think doing them well in advance (submitting them at least 24 hours prior) will help with this mistake.

skimming
      I need to read the text more comprehensively and not just look at the examples and definitions.
      Skimming the reading instead of thoroughly reading it would help my understanding.
      I feel the one big thing I need to quit doing is only skimming the chapters in the book, unless directed to do so.

skippingclass
      Even though skipping one class may be okay. It's the fact that it's the start of a bad habit and can easily lead to MORE classes skipped. Which is NOT okay.

skippinghomework
      I have been pretty lazy about not doing the reading assignments and the online hw in time so I will be much better at that from here on out.
      I used to remember homework but with my work schedule changed that and threw me out of the habit. I can't let myself forget homework.
      If I think I fully understand a subject I sometimes won't do one of the homeworks on that topic but it might have a slightly different approach that I'm missing out on by skipping it.
      I need to quit forgetting to do pre- and post-lab assignments.
      I will quit not doing my homework. It isn't helpful or fair to myself or my grade.

slacking
      I usually just try to answer the homework questions with the information I already know, So I intend to change that and actually read and maybe even study what is assigned.
      I forgot couple times to do homework.
      If I quit skipping the homework and reading assignments, my grade would be higher and so would my understanding. I learn everything while in class just fine but doing the homework would really give my grade and knowledge a boost.
      Study for quiz more to succeed on quizzes.
      I have been familiar with the concepts and formulas, so I have not studied much. The midterm was sort of a wake-up call, as I seemingly lost points for my explanations being too wordy, even though the majority of my answers were correct. I need to be less wordy with my explanations and show more numbers.
Start word tags:
askquestions
      I always try to understand the information myself the best I can and if I don't get it I tend to stress out and keep trying to get it on my own until I do. This is not the best way to handle the situation and I need to start asking more questions when I am struggling.
      Asking more questions, communicating more with my peers and with the instructor!
      I could start asking more questions or making comments in the homework to clarify things I am confused on.

earlier
      Study a few times ahead of the test day Instead of just the night before.
      I am going to start studying at least 24 hours earlier (before the midterm) than when I started for the first midterm.
      In order to stop my procrastinating I need to start working on a better time management plan.

gethelp
      Asking for help when I need it. I’m so stubborn headed and always act like I understand when I don’t

gototutoring
      I should seek help when I have trouble answering a question.
      I usually meet with my tutor once a week to work on homework and ask about the topics we have covered in class instead of meeting with him before each homework assignment is due so I know what is going on before class and keep up with the examples.
      I saw the tutor the morning of the midterm and asked about a million questions about the practice tests. He was super helpful and I realized it would be wise to see him more often and in advance of the midterms to solidify my understanding of the concepts well before we are tested on them.

homework
      Homework is a must on the top of my list, I've been going to the learning center to talk to our tutor, but I need to go a little bit more.

practice problems
      I'll take more time to do the reading assignments so that I can understand it and actually do all the practice problems.
      Do problems from old tests and problems from the book.
      I need to understand and be able to do more complex problems especially if it involves angles/trig as well as any unknown variables that require extensive thought.
      I feel that practice problems are the only way to grasp the material.

prioritizinglabs
      I should read the procedure before lab starts so I have a better idea of what we are doing which will save time. So far labs are the only thing I have had issue with in this course.
      I really need to improve my lab score. I am not sure how to do this besides just attending and completing labs.
      Oh, labs! They seem so easy until you have to explain what you just experimented. Easy to follow the instructions but most of the time I don't have a real clue of the purpose of the experiment until I take a 20 min thought about everything that is going on. Therefore I will try to understand beforehand what is being asked; and what we are looking for and why.

reading
      I would like to start really reading everything assigned and doing the suggested problems that we have before coming to class.
      At the beginning of the semester I was really on top of reading the chapters. Since about the last quiz I have dropped the ball and only been reading the blog which isn't bad because it summarizes the reading. But, I need to start reading the book again to increase my chances of success and understand the concepts better than I already am.

rereading
      I will start spending more time on the blog post reading rather than reading more quickly. Instead I will read more carefully for understanding.
      I mostly skim the book but there is lots of good stuff in there that I should go back and re read instead of reading my "fun" books.
      I need to go back and re-read the old homework questions every once and awhile. reviewing
      I think it will help to review what was covered in class everyday with my tutor.
      I think I don't take too much time on reviewing after class session and I need to start that more often so that I know my materials.

studygroups
      Studying with others is a great way to get quick help on something you might be struggling with.
      It would help to form study groups for this class in order to bounce ideas back and forth with someone and see how other people work through practice problems you organize for us.

studying
      I don't normally study for physics or any classes, to be honest.
      Studying before the day of tests and quizzes to remember more.
      I barely study for the quizzes, which is proving to be my greatest downfall in losing points in the class.
      I definitely need to make more time to study/review more often. I do have two other classes that require a fair amount of homework so I don't get to study as often as I probably should.
      I have done little to no studying for any tests or quizzes in this class, and I need to begin studying for this class.

studymore
      I don't really spend too much time out of the classroom focusing on this class other than doing the homework and assigned readings. If i start to do that, my quiz and test scores are sure to improve.
      I need to start reading in the book and understanding what I'm supposed to learn.
      Going over things as soon as I learn them.
      Need to have a better preparation for how im going to study. Last minute can only do so much. So let's start making more time for studying and working on problems that confuse me as well as remembering what I already know.
      It isn't my first instinct to draw diagrams. For example, I still don't understand the diagrams for Newton's laws in terms of directions of all forces.
      I feel as if I don't study enough for this class. So if I studied more I would be able to obtain an even better grade.
      Start putting time aside to study more, less time socializing more time studying.
      Every night after work or school I will spend an additional 30-60 minutes studying the class blog reviewing old questions and notes.
      It would largely benefit me to have notes from the Powerpoints provided but also notes that I have personally gathered from the textbook. It would help by allowing me to further review the concepts being covered in class. It also would not be a bad idea to do some extra problems from the textbook.
      I am not the best test taker, so I plan to try to improve the way I take tests and quizzes in order to do better in that part of this class.

studyrooms
      Before the exam, I went to the library and took advantage of the study rooms and utilized the whiteboards in them to work out the problems in the book. It was the first time I ever did that for any class and I really enjoyed it. It was so much more freedom than using a pen and paper.

winning
      I will study and do my homework until I have a winning grade and I'm proud of my work.

Online reading assignment question: keep, quit, start

Astronomy 210, fall semester 2017
Cuesta College, San Luis Obispo, CA

"2017-07 Astr 210 keep"
Waifer X
flic.kr/p/FUWpH8

Wordle.net tag cloud for "keep" resolutions generated by responses from Astronomy 210 students at Cuesta College, San Luis Obispo, CA, spring semester 2017.


"2017-07 Astr 210 quit"
Waifer X
flic.kr/p/FUWq1x

Wordle.net tag cloud for "quit" resolutions generated by responses from Astronomy 210 students at Cuesta College, San Luis Obispo, CA, spring semester 2017.


"2017-07 Astr 210 start"
Waifer X
flic.kr/p/FUWrMD

Wordle.net tag cloud for "start" resolutions generated by responses from Astronomy 210 students at Cuesta College, San Luis Obispo, CA, spring semester 2017.

Students were asked to answer a "keep-quit-start" online reflection (hosted by SurveyMonkey.com) on their studying strategies/pitfalls (Mubayiwa, 2009).
Enter a word or brief phrase that describes what you intend to keep doing to study for this class. Explain your answer to the above question (what you intend to keep doing to study for this class).

Enter a word or brief phrase that describes what you intend to
quit doing to study for this class. Explain your answer to the above question (what you intend to quit doing to study for this class).

Enter a word or brief phrase that describes what you intend to
start doing to study for this class. Explain your answer to the above question (what you intend to start doing to study for this class).
[Word tags have been edited to consolidate related common subjects; student explanations are verbatim.]

Keep word tags:
beinginterested
     I find that most subjects become more and more interesting the more I learn about the ways in which they are both philosophical and practical.

everything
     I feel like I am doing pretty good in the class, but definitely as not well as I could be. But for the most part, I pay attention/understand the material in class, as well as do the homework.
     I am working avidly to get a biology degree, I have been studying at cuesta college for the past year or two. I make sure to show up to class on time, to take notes when the instructor is giveing out information, to do all assigned work, and turn my homework in on time. I do my best to study before quizzes and tests, when I have time.
     I intend to keep pushing myself to understand the text, lectures, and do well on quizzes. This class is only hard if I allow myself to get lost in the wide range of information that is presented to us.

flashcards
     I have been using notes/flashcards for notes in while reading chapters. I write down important info. and its easy to study while I'm on the go (my life).
     I made 110 notecards to study for the midterm and am very happy with my 89%!

gotoclass
     I am going to continue attending classes as consistently as possible because I feel as though that is the number one factor to doing well and keeping up with the coursework.
     If a student is in class, he/she is more likely to keep up with homework, quizzes, and exams.
     I learn the most when I come to class. When you explain everything in class I learn the most from that.
     Being present for class is one of the most important parts of passing any class because if you miss class than you probably won't know what is going on and you will fall behind.
     I need to continue attending class in order to learn the material that I did not understand from the Powerpoints or book.
     I intend to keep coming to class every time because that is where important messages or clarifications are made. The in-class-actives are also vital for points in the class.
     I missed one class and I was completely lost for a whole section of our work. It is extremely important to go to class so that I can understand what I'm confused about.
     I plan to continue to show up for class, awake and ready to participate.
     Attending every class and paying attention during class explanations
     I need to continue coming to class (which I am).
     It's important to go to all the classes since we only meet once a week and be active in the discussions.
     Attending class is helpful because the in class activities help to understand the material better. Sometimes some of the reading from lecture can be a little confusing without further explanation. However, having in class discussion/demonstration helps to understand the concept.

homework
     Homework is super-important to keep up your grade and to be prepared for the upcoming class! If I keep it up and turn in all my assignments I'll be okay.
     I've actually done really well so far this semester to make sure I complete the reading assignments. I have missed one and I don't intend to.
     I will continue to complete all of my homework assignments on time in order to keep my grades up and get an A in astronomy this term. Plus I actually really like your style of doing our assignments with the surveys. It allows me to really take interest in the assignment plus I get a preview of what we cover in class so I really like being prepared. that is a way to gain easy points to help keep a good grade.
     I haven't missed a homework assignment and it seems to be helpful and directly related to the quizzes which is helpful.
     I haven't miss any yet,and I'm not going to stop now.
     I intend to continuing doing the readings assignments because I've noticed its helped me understand the material a lot.
     I need to keep doing the reading assignments because they're easy points. for me to pass this class I need to keep doing my homework because if I do not then I will fail the class.


keepingup
     It would be easy to slack off, but taking the time to study or do the homework even when I don't want to is the essential thing for me.

managetime
     It is important to study during the afternoon of a Friday and not postponing it to the last day before a quiz or homework.

participation
     I intend to participate in the in class group activities and online homework.

practicequiz
     I study the practice quizzes to prepare for each quiz/midterm.
     It helps to know what the right answers are on the quizzes as they were also in the test.
     Something I've found helpful is reviewing past quizzes and looking at the quiz archive online to review for future quizzes and the midterm. It has also been helpful for me to look at past midterm questions and sample responses so I plan on continuing to use this as a tool to help me study.

reading
     Reading the book and also the blog is important. Also reviewing the chapters, blogs, and previous test/quiz questions helps to study for the exams.
     I find that I need to read things a few times and take more note on my reading comprehension
     I need to keep assimilating the information.
     I find it very important and helpful to always fully go over and study the blogs and textbook readings before class. By getting to learn the content before class it gives me a better understanding of concepts I found more difficult when you explain them in class.
     Reading my notes, PowerPoints, and book really helped me get a great score on my midterm.
     I intend to keep reading all of the assigned materials in order to succeed in class. This will allow me to potentially retain everything I'm expected to know, regardless of whether or not it's currently needed to answer an immediate homework question.

review
     I will review previous practice quizzes before actual quiz days, or exam days since I know there will be a few questions from prior quizzes that will be on future tests. So I will go over each question carefully.
     I usually study the material and do the practice quiz a couple hours before class so it's all fresh in my head.
     Studying is the way to succeed in school and it helped me get a good score on the midterm. Studying the quizzes and in class activities are very helpful and I plan to keep on doing this.

rewritenotes
     It helps me remember the material to write my notes more then once.
     When I started to not get what was going on, it helped to draw out what was going on and then review the visuals later on. It helped me connect certain ideas and definitions together rather than just writing down ideas on paper, and helped me remember key points in the tests later on.

studying
     When I studied really hard for the last midterm, I got an A, so if I keep doing what I did to prepare, I should be able to keep doing better.
     I feel like with this class, studying entails reading the assignments, preparing for quizzes and tests, and also just the general doing well in the class. Studying keeps good grades.
     I intend to keep studying thoroughly for the quizzes and midterms
     I will continue studying the night prior to quizzes. I believe studying closer to the time of the actual quiz helps me remember the information better.

takenotes
     I am going to keep taking nice notes with visuals, color coded, etc. That seems to be helping me.

trying
     Keep trying to read through things that are difficult, keep trying to do finish the study guides, and keep trying to make time to at least look over the study guide questions to keep the information fresh.
Quit word tags:
distractions
     I will sacrifice enjoyment from watching Raiders/Lakers games when I have to study for an exam or quiz for not only this class but any class that I need to actually study for. I will force myself to do that. (I have a great amount of will power)
     During class I check my phone a lot and it distracts me from listening in class. I have started to not do that during the last few classes and it has helped me pay attention a lot more in class.

missingclass
     I have missed two classes, one because I was super sick and the other because my kids were. I can't miss class because of the points and because we cover so much it feels like I miss weeks of class.

missinghomework
     I always forget about the surveys for class, I don't remember them until the last minute and by that time its too late. So I decided that I'm going to do them ASAP so that I don't forget about them.

notaskingquestions
     I intend to pay attention more in class and make sure I ask questions on subjects I am not exactly a hundred percent sure on, and make it a priority to really get the information rather than blowing it off and say "oh I'll get it later."
     I intend to stop hesitating to ask questions during class when I do not understand something.

notfollowingthrough
     I have strange tendencies to forget the things I don’t understand, which hurts me in the tests later on. I need to focus on those topics and search for their answers rather than focusing on only the things I find interesting.

notparticipating
     When you participate in the class the teacher knows that your paying attention and you retain the information a lot better.
     I could participate in discussions more, which could help me understand what the correct answers are.

procrastinating
     I'm so bad at this. I wait until the day before something is due before I start it which is a bad habit I have to break if I want to do better in my classes.
     I plan to stop forgetting to do my homework. My life is super busy and I have been forgetting to do some homework. I set an alarm on my phone every Friday after work for me to sit down and make sure all my Astronomy class hmw is done.
     I am taking four classes right now so it's hard to focus on all them !! Procrastinating doesn't help in studying especially with exams.
     I have a tendency to put off my reading assignments until they are due. This causes a crunch in time, resulting in not being able to spend enough time on the material.
     Procrastinating on beginning the reading assignment, because if I push it off till the weekend, it feels like a lot more reading than it actually is.
     I tend to do the reading assignments one or two days before the online reading assignment is due, which is not a smart choice on my part since sometimes I have other things to do and I may end up stressing over having to finish them.
     I always wait last minute to do the homework, and I need to start doing it earlier in the week rather than later.
     I tend to put some of this class work off because I'm struggling in statistics
     I need to quit procrastinating in order to succeed. I know I have a very busy schedule but I need to remember to do things with time and it will pay off in the long run.
     I intend to quit procrastinating as I often wait until the very last minute to complete assignments, and this is not ideal for counterbalancing stress. (Even when I get straight A's, it still is not good for ones health).
     I am probably the best procrastinator ever and love to wait till the very last day or hour an assignment is due to turn it in which can sometimes be pretty stressful. Studying one day before a quiz.
     I tend to procrastinate for studying for quizzes or tests and I need to instead continuously keep up on studying so that the information sticks and isn't crammed just for the test.
     I usually wait until the last minute to complete homework assignments.
     I need to quit waiting until the night before to begin a task because that causes me to stress out/stay up late.
     I tend to procrastinate the online assignment for a while, so i'm going to quit procrastinating it.
     I need to study and do the post and pre-online assignments. I have a million excuses as to why I try to cram reading the text to the night I do my assignments. I need to go through the text sooner and several times to really have a deep understanding of it.
     Break down the reading so it doesn't make it too painful to get through in one a couple nights. stop waiting for the last minute to study, and or read through unfamiliar items.
     I intend to stop submitting the assigned homework the night it's due in order to succeed in class. My procrastination in completing the homework has not been doing me any favors.
     I plan to quit procrastinating because I hate cramming everything until the last moment and it could be detrimental to my success in this class.
     Stock trading.
     I always wait until I'm stressed out to study, so I will start studying earlier
     I tend to wait to the last minute to do assignments and the required reading.
     I procrastinate ALL THE TIME, every single semester. I need to stop procrastinating on studying mainly. I normally get my reading assignments done in time, but I have a tendency to procrastinate when it comes to quizzes. Procrastination is not great because it leaves me stressed with all the amount of work I have to do the night before it's due.
     This is the worst thing I could do it doesn't benefit me at all. So I am going to study throughout the week.
     I intend to not wait to study. I tend to put it off until the event is relatively close.
     I am going to stop procrastinating when it comes to the online surveys, so that I have more time to study for quizzes the night before class.

quitting
     I intend to keep working and reading. Quitting is not an option.

skimming
     I have only read one or two book chapters for the sections and glanced at another one or two. This is bad because I feel like I'm not getting everything I need really (or enough repetition at least) to retain the information.
     I intend to quit being lazy when it comes to doing the reading and homework assignments. Some times I find my self rushing through the content I need to be studying in further depth and then end up confused when reviewing it in lecture.
     Sometimes when I'm reading the textbook chapters I find myself skimming over some parts that I don't think are as important. Instead, I should thoroughly read over every part of the textbook chapters because I could be missing relevant information.
     I am not the best at reading the textbook, so I hope to try to do the reading since I know not all the information is in the reading assignments.

slacking
     I am going to prepare more for the tests.
     I plan to stop trying to do the homework without reading the chapter first
     Trying to wing quizzes and not reading anything.
     If I did study better I am sure I would do better on exams/quizzes.

stayinguplate
     I think sleep just helps focus in general and considering it's a later class I feel like getting some sleep would help me stay awake easier.

stressing
     I tend to stress out, and that will not do me any good.

usingcheappencils
     Cheap pencils inhibit my learning ability. There is nothing more that I hate, than cheap crummy pencils. I like the Ticonderoga #2 pencil. It is the pencil I use.
Start word tags:
askquestions
     I always hate asking questions cause I get so nervous, but there's a lot of things I need clarification on, so I really need to start asking in order to improve my grade.
     I want to start asking more questions during class, so that I am able to understand some of the information more.

continuing
     I will continue to do the things I have been doing as far as reading/reviewing materials.

earlier
     I am going to start the reading earlier during the week each week. I think this will help me break the reading into smaller chunks rather than one long reading session.
     If I start to do assignments several days before they are due it will help me to reduce my chances of procrastinating which will help me to obtain a good grade.
     Remember to do my online work.
     I tend to procrastinate and that puts a lot of pressure on at the last minute, so I need to give myself enough time to study before a quiz.
     The earlier I do my homework, the more time I have to study and prepare also, instead of procrastinating to a later time.
     I intend to start completing the assigned homework the night it's assigned in order to succeed in class. This way, if I experience technical difficulties submitting (again) I will have time to find a way to fix them or work around them.
     I study at the last minute and need to give myself more time to study/practice
     The reason I need to start planning ahead is because I need to be ready for test before they come up not the day they are up.

flashcards
     I have been thinking about a different studying method because my current method of going over notes is not helping enough. I will start using flash cards since that was a method that had worked for me many times in high school.

focusing
     I am going to start studying in more quiet environments such as the library as compared to my house with all my roommates.

gotobedearlier
     I’m the type of person who stays up all night the day before a test to study (it's a way for me to remember for some reason) but this makes me worry over tests and doze off during class/es. I have important questions so I need to stay awake, and going to bed earlier should help me do this.

gotoclass
     Work with others to understand areas that might not be simple for me.
     That way my overall success in the class will improve.

participating
     Participating in discussions helps to understand what the correct answers are.
     I tend to like to work alone versus in a group. I have had a couple bad partners in the the class groups. It has caused me to shut down a little and resist listening to the points of view from other classmates. I need to start being much more open to their input.

reading
     I want to start reading the textbook more. While I have done some of the assigned reading I have not done nearly enough which I want to do better at.
     I have not been reading the book at the proper times (as in before class), so I would like to start. It seems that because this class is so straight forward, I have the tendency to prioritize this class last. However, I try to prioritize learning rather than simply reading.
     I would like to take more time reading the material because I sometimes feel that I don't spend enough time on it.
     I don't always read the textbook and instead refer to the presentation previews. I need to start reading the textbook more often.
     I usually honestly just very briefly skim the presentations. I feel like actually reading the presentations would help me a lot.

rereading
     I start to read but it feels like some of the reading has everything to do with what we are learning and the most of it has nothing to do with what I am learning. I just cannot stay focused on it.

reviewing
     I haven't been revisiting information following the discussion in class. I primarily only revisit the info to study for quizzes.

studygroup
     I will collaborate with students in the class before/after class to gather feedback on the material that was assigned to be read, whether that be in textbooks, or online presentations and write notes, knowing it will probably be on a quiz/exam.
     I could probably reach out to some people in class to form a study group and review concepts before our next midterm.
     Getting together with other classmates and go over the study guides for quizzes/exams.
     Find a study partner or group to bounce knowledge off and get knowledge from. Talking things through really helps.
     Small group communication.
     Studying with friends so that I can get better grades on the quizzes and tests.

studying
     I haven't really studying,for any of these quizzes because I simply haven't had time. Now I know that I definitely need to make time for this to improve my test scores.
     I will also study the in-class activities.
     Setting myself a regular study routine, it helped me manage time, and it actually makes me want study.
     I intend on actually studying for the quizzes and exams.
     I need to actually go through the online portions and purchase the book so I can study that.

studymore
     Though I do actually study I can admit that I might not study as hard as a could so I would like to start studying harder so I can ace all my tests and be a really dope ass astronomer by the end of the term.
     I don't study as much as I should be, especially on the topics that I'm confused about.
     I hope to do more studying outside of class and homework assignments and not just before a quiz or test, so I am not cramming last minute.
     I need to review the material more than once if I really want to understand it, because sometimes I don't fully get it the first read through. And it's a good refresher before class even if I do already understand it. There's lots to remember so studying is important.
     I plan to study a lot more for test. Also, I have been re-reading chapter or concepts that I don't understand in order to comprehend what I am reading.
     I tend to study at the last minute for quizzes and I need to start studying earlier and more.
     I intend to study more and make sure I review the information on previous tests in order to be well prepared for the tests/ quizzes in the future, as well as being able to critically understand what the information is asking instead of just "understanding it." My goal is to get 100 on every test.
     I could study a lot better and get better grades on my quizzes/exams.
     Take practice exams and keep up with the required reading. At least two hours of studying for each of the upcoming quizzes.
     This relates to the procrastinating, I need to focus on studying more for the quizzes/midterm. With school and work it can be a lot because depending on my shift, I may be too tired to study/do homework. I should make time for studying, even after my 6am work shifts.

takenotes
     I want to start taking notes of the assigned text book readings. The content can tend to be dry and boring. I find myself reading an entire chapter and not being able to recall what I just studied. So I think it would be best to take notes and I read along.
     In class I think I'll remember certain things, but then when I think back on what I need to know, I forget what you explained.
     I think that taking notes is an important part of learning, I am going to make sure to bring lots of extra paper to class, so I can take many good, in-depth notes.

Astronomy current events question: analysis of martian meteorites

Astronomy 210L, fall semester 2017
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)
University of Glasgow news release, "New Research Uncovers 90 Million Years of History of Martian Volcano" (October 4, 2017)
gla.ac.uk/news/headline_551973_en.html
Analysis of meteorites found on Earth released from impacts on Mars' surface provide a timeline of __________ in Mars' past.
(A) volcanic eruptions.
(B) plate tectonics.
(C) mineral-rich oceans.
(D) weather patterns.
(E) a temporary atmosphere.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 35 students
(B) : 2 students
(C) : 7 students
(D) : 1 student
(E) : 2 students

Astronomy current events question: Mars' underwater hot springs

Astronomy 210L, fall semester 2017
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)
Guy Webster, Jenny Knotts, Laurie Cantillo and Dwayne Brown, "Mars Study Yields Clues to Possible Cradle of Life" (October 6, 2017)
jpl.nasa.gov/news/news.php?feature=6966
Mars may have had underwater hot springs, based on __________ observed by NASA's Mars Reconnaissance Orbiter:
(A) released gases.
(B) ongoing volcanic eruptions.
(C) infrared heat sources.
(D) mineral deposits.
(E) erosion features.

Correct answer: (D)

Student responses
Sections 70178, 70186
(A) : 6 students
(B) : 6 students
(C) : 2 students
(D) : 27 students
(E) : 6 students

Astronomy current events question: the moon's temporary atmosphere

Astronomy 210L, fall semester 2017
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)
Lunar and Planetary Institute news release, "New NASA Study Shows Moon Once Had an Atmosphere" (October 4, 2017)
lpi.usra.edu/features/100517/moon-atmosphere/
Analysis of trapped gases in rocks brought back from the moon indicate the possible presence of __________ there in the past.
(A) a temporary atmosphere.
(B) dangerous radioactivity levels.
(C) mineral-rich oceans.
(D) strong magnetic fields.
(E) plate tectonics.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 40 students
(B) : 1 student
(C) : 6 students
(D) : 0 students
(E) : 0 students

20171026

Astronomy quiz question: meeting the first two IAU planetary qualifications

Astronomy 210 Quiz 4, fall semester 2017
Cuesta College, San Luis Obispo, CA

Refer below to the minimal qualifications established by the International Astronomical Union for a planet:
I. Orbits the sun.
II. Shape "rounded-out" by gravity.
III. Cleared/dominates orbit around sun.
Which solar system object(s) meets both qualifications I and II, but does not meet qualification III?
(A) Earth.
(B) Megaclite, an irregular-shaped moon of Jupiter.
(C) Ganymede, a moon of Jupiter larger in size than Mercury.
(D) Eris, a dwarf planet.
(E) (More than one of the above choices.)
(F) (All of the above choices.)
(G) (None of the above choices.)

Correct answer (highlight to unhide): (D)

Earth orbits the sun (meeting qualification I); is "rounded out" in shape (meeting qualification II); and gravitationally dominates its orbit around the sun (meeting qualification III).

Megaclite orbits Jupiter (and does not directly orbit the sun, failing qualification I); is irregular in shape (failing qualification II); and does not dominate its orbit around the sun (failing qualification III), as it is gravitationally bound to orbiting Jupiter as Jupiter orbits the sun.

Ganymede orbits Jupiter (and does not directly orbit the sun, failing qualification I); is larger than Mercury in size and thus must be round in shape (meeting qualification II); and does not dominate its orbit around the sun (failing qualification III), as it is gravitationally bound to orbiting Jupiter as Jupiter orbits the sun.

Eris orbits the sun (meeting qualification I); is "rounded out" in shape (meeting qualification II); but does not gravitationally dominate its orbit around the sun, sharing it with other Kuiper Belt objects (fails qualification III).

Thus Eris is the only object listed here that meets qualifications I and II, but does not meet qualification III.

Section 70158
Exam code: quiz04nqyL
(A) : 1 student
(B) : 0 students
(C) : 2 students
(D) : 33 students
(E) : 6 students
(F) : 0 students
(G) : 0 students

Success level: 80% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.50

Section 70160
Exam code: quiz04N3rn
(A) : 1 student
(B) : 0 students
(C) : 1 student
(D) : 22 students
(E) : 3 student
(F) : 0 students
(G) : 2 students

Success level: 77% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.67

Astronomy quiz question: IAU classification of irregularly-shaped(?) "Tyche"

Astronomy 210 Quiz 4, fall semester 2017
Cuesta College, San Luis Obispo, CA

Refer below to the minimal qualifications established by the International Astronomical Union for a planet:
I. Orbits the sun.
II. Shape "rounded-out" by gravity.
III. Cleared/dominates orbit around sun.
University of Louisiana at Lafayette astronomers propose[*] that "Tyche" may be a yet-undiscovered object orbiting the sun in the distant Oort cloud (a diffuse region of comets out beyond the Kuiper belt):
These researchers suggest that our sun may have a companion in the Oort cloud, which they have dubbed "Tyche," jostling the orbits of many comets there and causing some to fall toward Earth.
According to the IAU qualifications, if Tyche is found to have an irregular shape, it would be classified as:
(A) a moon.
(B) solar system debris.
(C) a dwarf planet.
(D) a planet.
(E) (None of the above choices.)

[*] Charles Q. Choi, "Giant Stealth Planet May Explain Rain of Comets from Solar System's Edge," space.com/9612-giant-stealth-planet-explain-rain-comets-solar-system-edge.html.

Correct answer (highlight to unhide): (B)

Tyche directly orbits the sun (meeting qualification I), but with an irregular shape, it would not satisfy qualification II, classifying it as solar system debris. It may or may not satisfy qualification III (as it is not certain whether Tyche is merely "clearing," or has "cleared out" its orbit around the sun), but this does not affect its solar system debris classification.

Section 70158
Exam code: quiz04S4pR
(A) : 0 students
(B) : 42 students
(C) : 0 students
(D) : 0 students
(E) : 0 students

Success level: 100% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0

Section 70160
Exam code: quiz04N3rn
(A) : 2 students
(B) : 22 students
(C) : 2 students
(D) : 0 students
(E) : 0 students

Success level: 88% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.21

Astronomy quiz archive: solar system

Astronomy 210 Quiz 4, fall semester 2017
Cuesta College, San Luis Obispo, CA

Section 70158, version 1
Exam code: quiz04S4pR


Section 70158
0- 8.0 :  
8.5-16.0 :  
16.5-24.0 :   ****** [low = 18.5]
24.5-32.0 :   ******************* [mean = 30.7 +/- 5.8]
32.5-40.0 :   ***************** [high = 40.0]

Section 70160, version 1
Exam code: quiz04N3rn


Section 70160
0- 8.0 :  
8.5-16.0 :   * [low = 12.0]
16.5-24.0 :   ***
24.5-32.0 :   ************* [mean = 30.4 +/- 6.8]
32.5-40.0 :   ************ [high = 40.0]