Showing posts with label astronomy think-pair-share question. Show all posts
Showing posts with label astronomy think-pair-share question. Show all posts

20120305

Education research: preliminary feedback on flashcards and online reading assignments (Cuesta College, Astronomy 210, spring semester 2012)

Cuesta College students taking Astronomy 210 (introductory astronomy) at Cuesta College, San Luis Obispo, CA use flashcards to engage in peer-interaction ("think-pair-share") discussion questions during lecture, and complete weekly online reading assignments (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or ask (anonymous) questions or make (anonymous) comments to be shared by the instructor in the following class.

Through the fifth week of instruction, students were given the opportunity to evaluate the instructional components of the course, and the use of flashcards and online reading assignments in an online "Learning Resource Survey" hosted by SurveyMonkey.com. Questions from section II are adapted from the Student Assessment of Learning Gains (SALG) survey (developed by Elaine Seymour, Wisconsin Center for Education Research, University of Wisconsin-Madison), and questions from section III (III.1, III.3, III.5, and III.7) were adapted from a "Clicker Attitude Survey" (N. W. Reay, Lei Bao, and Pengfei Li, Physics Education Research Group, Ohio State University).

These are the complete survey results. Analysis will be forthcoming after more data has been compiled from future semesters. Values for the mean and standard deviations are given next to the modal response category for each question. Note that the order of questions within sections II, III, and V were randomly scrambled for each student.
Learning Resource Survey
Cuesta College
Astronomy 210 spring semester 2012 sections 30674, 30676
(N = 57)

I. In order to receive credit for completing this survey,
enter your last name, then first name for credit.
____


II. How much did each of the following aspects of the class help
your learning?

II.1 Lecture/slideshow presentations by instructor.
1. Not at all 2 : **
2. Just a little 3 : ***
3. Somewhat 16 : ****************
4. A lot 22 : ********************** [3.7 +/- 1.0]
5. A great deal 13 : *************

II.2 Working in groups on in-class activities.
1. Not at all 1 : *
2. Just a little 3 : ***
3. Somewhat 8 : ********
4. A lot 23 : *********************** [4.1 +/- 0.9]
5. A great deal 22 : **********************

II.3 Using flashcards to participate in class.
1. Not at all 0 :
2. Just a little 3 : ***
3. Somewhat 10 : **********
4. A lot 28 : **************************** [4.0 +/- 0.8]
5. A great deal 16 : ****************

II.4 Reading the textbook.
1. Not at all 2 : **
2. Just a little 15 : ***************
3. Somewhat 27 : *************************** [2.9 +/- 0.9]
4. A lot 11 : ***********
5. A great deal 2 : **

II.5 Interacting with other students during class.
1. Not at all 0 :
2. Just a little 2 : **
3. Somewhat 13 : *************
4. A lot 26 : ************************** [4.0 +/- 0.8]
5. A great deal 16 : ****************

II.6 Interacting with other students outside of class.
1. Not at all 17 : *****************
2. Just a little 14 : **************
3. Somewhat 16 : **************** [2.4 +/- 2.5]
4. A lot 8 : ********
5. A great deal 2 : **

II.7 Online reading assignments.
1. Not at all 2 : **
2. Just a little 12 : ************
3. Somewhat 28 : **************************** [3.1 +/- 0.9]
4. A lot 11 : ***********
5. A great deal 4 : ****

III. Answer the following statements which may or may not describe
your beliefs about the use of flashcards in this class.

III.1 I like using flashcards.
1. Strongly disagree 0 :
2. Disagree 3 : ***
3. Neutral 10 : **********
4. Agree 32 : ******************************** [3.9 +/- 0.8]
5. Strongly agree 13 : *************

III.2 Flashcards helped me understand lectures better.
1. Strongly disagree 1 : *
2. Disagree 2 : **
3. Neutral 7 : *******
4. Agree 37 : ************************************* [3.9 +/- 0.8]
5. Strongly agree 10 : **********

III.3 I would recommend using flashcards in future semesters of this class.
1. Strongly disagree 1 : *
2. Disagree 3 : ***
3. Neutral 6 : ******
4. Agree 26 : ************************** [4.1 +/- 0.9]
5. Strongly agree 22 : **********************

III.4 I will avoid other classes using flashcards in future semesters.
1. Strongly disagree 17 : *****************
2. Disagree 35 : *********************************** [1.9 +/- 2.3]
3. Neutral 4 : ****
4. Agree 1 : *
5. Strongly agree 1 : *

III.5 Flashcards were a positive experience.
1. Strongly disagree 1 : *
2. Disagree 2 : **
3. Neutral 6 : ******
4. Agree 37 : ******************************** [4.0 +/- 0.8]
5. Strongly agree 12 : ************

III.6 Too much time in class was spent using flashcards.
1. Strongly disagree 8 : ********
2. Disagree 38 : ************************************** [2.1 +/- 1.3]
3. Neutral 7 : *******
4. Agree 3 : ***
5. Strongly agree 1 : *

III.7 Too many flashcard questions were asked.
1. Strongly disagree 12 : ************
2. Disagree 36 : ************************************ [2.0 +/- 1.7]
3. Neutral 7 : *******
4. Agree 2 : **
5. Strongly agree 1 : *

III.8 Using flashcards was difficult.
1. Strongly disagree 21 : *********************
2. Disagree 21 : ********************* [2.0 +/- 2.8]
3. Neutral 13 : *************
4. Agree 2 : **
5. Strongly agree 1 : *

IV. (Optional.) Please type in any comments you may have regarding
the use of flashcards in Astronomy 210.
The following are all of the student responses to this question, verbatim and edited [as noted] for clarity. Some responses have been bolded for emphasis.
"I enjoy using them."

"I think the flash cards work great to help everyone think for themselves first and then, i wrong, gain understanding."

"I like being able to talk to my neighbor to see why they think their answer is correct.

"i think they help a bit"

"If there are multiple options in the question that have different answers, then please go over the other options so that we can understand the difference the word makes to the answer..."

"Nice way to keep students awake in class. First time i've ever had a teacher use flash cards and it's a good idea!"

"I really like the fact you use flashcards rather than requiring the clickers in the bookstore."

"No problems using flashcards"

"Some questions are hard to understand."

"I think the flashcards are good. They test my knowledge throughout the course and its good that we interact with each other and teach each other the answers."

"Flashcards are used frequently, but only a couple questions are asked at a time."

"im gravy"

"I really like using flashcards in class, it helps me to further understand when we talk our answers over with other students."

"I like it when you have to debate with your group which flashcard answer is correct"

"i wish i had a way of going back and looking at the questions and answers after we have talked them out in class. once we go over it in class it doesnt stick in my brain. i try to write which question it is and why the answer is what it is but then i just fall behind on listening. having a class only once a week, i need to be able to look over exactly what ive learned because i cant remember"

"Give people like 5 seconds to pick an answer, give people like 20 seconds to talk if the answers were not right. i like the flashcards but the pace of the questions seems a lot like 6th grade."

"They help me realize that I don't know things I assume I know in lecture. Makes me feel stupid a lot but helps my grade so I don't complain."

"I like using the flash cards a lot. It gives us a chance to try and answer a question then clear up problems or difficulties we have. Its also very considerate seeings how the clickers cost money and are easy to forget and the batteries can run out. I HATE CLICKERS!!"

"flashin peoples pretty sick.."

"maybe [don't] ask us to hold the flash cards so close to our faces, even though it does hide the answer from the other classmate. I don't know how often my classmate wash their hands. I have gotten two colds this semester... just saying."

"flashcards are a smart way to keep the class engaged without buying special clickers"

"flashcards can let you know my input even if i am shy about answering questions in front of the class."

"This class is my first experience with flash cards. It took some getting used to, but I definitely like it. It makes for a nice change from the typical lecture class where you get talked at for hours with no interaction."

"I like that we use them!"

"While I think flashcards are a good tool, I think they are best utilized for memorization rather than actually LEARNING material. I believe there are better methods that can be used in-class to teach rather than flashcards. However, I can kind of understand why you use the flashcards with a larger than normal class."

"where duh purp?"

"i like that you give the option of 'E' [Unsure/guessing/lost/help!] so we dont have to make like eggs and scramble to come up with something to say"

"I think rather than calling on the right answer every time, it might be embarrassing (oh well), but call on some people occasionally with the wrong answer and ask why the got that answer"

"I find that flash cards clear up confused ideas that I might have."


V. Answer the following statements which may or may not describe 
your beliefs about the use of the online reading assignments in this class.

V.1 I like working on the online reading assignments.
1. Strongly disagree 1 : *
2. Disagree 9 : *********
3. Neutral 24 : ************************ [3.2 +/- 0.8]
4. Agree 21 : *********************
5. Strongly agree 2 : **

V.2 Online reading assignments helped me understand lectures better.
1. Strongly disagree 1 : *
2. Disagree 9 : *********
3. Neutral 19 : *******************
4. Agree 28 : **************************** [3.3 +/- 0.8]
5. Strongly agree 1 : *

V.3 I would recommend using online reading assignments in future semesters of this class.
1. Strongly disagree 0 :
2. Disagree 2 : **
3. Neutral 19 : *******************
4. Agree 32 : ******************************** [3.7 +/- 0.7]
5. Strongly agree 5 : *****

V.4 I will avoid other classes using online reading assignments in future semesters.
1. Strongly disagree 7 : *******
2. Disagree 35 : *********************************** [2.2 +/- 1.0]
3. Neutral 16 : ****************
4. Agree 0 :
5. Strongly agree 0 :

V.5 Online reading assignments were a positive experience.
1. Strongly disagree 1 : *
2. Disagree 3 : ***
3. Neutral 21 : *********************
4. Agree 31 : ******************************* [3.5 +/- 0.7]
5. Strongly agree 2 : **

V.6 Too much time outside of class was spent working on online reading assignments.
1. Strongly disagree 6 : ******
2. Disagree 39 : *************************************** [2.1 +/- 0.9]
3. Neutral 12 : ************
4. Agree 1 : *
5. Strongly agree 0 :

V.7 Too many online reading assignment questions were asked.
1. Strongly disagree 9 : *********
2. Disagree 36 : ************************************ [2.1 +/- 1.3]
3. Neutral 10 : **********
4. Agree 3 : ***
5. Strongly agree 0 :

V.8 Completing the online reading assignments was difficult.
1. Strongly disagree 8 : ********
2. Disagree 28 : **************************** [2.3 +/- 1.3]
3. Neutral 17 : *****************
4. Agree 4 : ****
5. Strongly agree 0 :

VI. (Optional.) Please type in any comments you may have regarding
the online reading assignments in Astronomy 210.
The following are all of the student responses to this question, verbatim and edited [as noted] for clarity. Some responses have been bolded for emphasis.
"NA"

"The only problem I have had with the reading assignments is confusion on when they are open and how to find which one we currently have to complete on the calendar."

"They aren't too bad so far, however i get that they connect with the reading but we never go over most of the stuff you ask from the assignment."

"Hard to unerstand what the answers were exactly felt as if they were to vague"

"Good balance of short answer Q's and multiple choice."

"They're very helpful."

"Thanks for taking the time to post the stuff online."

"I'm still not too sure about the reading assignments. Are we suppose to gather the information from online sources or are the answers suppose to be found in the chapters of our book."

"Keep at it P-dog!"

"I would recommend Dr. Len continue the use of online reading assignments in the future."

"sweet extra cred!!"

"It was annoying having the assignment due at midnight the night before. I would much rather have the assignment be due maybe an hour before the class. I would put more effort into the assignment and it would be more likely for me to remember the assignment before it was due."

"I'm not sure how much the online reading assignments are helping with my studies. I forget what my answers were whenever we review them in class and sometimes they are not relevant to what we were learning that week."

"The online reading assignments makes that class seem so much more organized instead of having to write down the homework and turn it in"

"i dont have much to say about online reading assignments. they are easy points and give me a heads up about what we will learn in class. but i would like to suggest more in depth powerpoints. they go really fast and dont have anything specific for me to write down and look over later to study...i learn best from seeing and writing. and i feel like i have zero notes for this class. just a bunch of scribbling i try to get done before you move onto the next topic. i need some more notes please!"

"I have missed almost every reading assignment. Its like I am an idiot. I like to compartmentalize my classes and stay organized, my ASTR class is at night on Wednesdays and Wednesday mornings are when I would naturally do my homework for that night... That is not working so well for me as I continue to get a closed message. This makes me feel stupid for not remembering every time to do it the night before the night of my class."

"They are very simple and I like how they are graded for completion."

"idk they are kinda hard to answer because the book words their sentences ridiculous and i like how you word things. when you say it, it makes more sense sometimes. hmm i guess you should probably just write a book for ur class cus that shit don't make no sense."

"maybe make the online reading assignments with ques to where in the textbook the information was coming from."

"online reading assignments are almost as cool as p-dog...."

"The technology (surveymonkey) worked really well. I like the way the reading assignments work, and they do help me to understand the material better by focusing my attention. However, I find that they are somewhat lacking in scope (i.e., perhaps 3-4 questions actually geared toward the reading)... but I understand that as a professor, you have to balance getting people to read while not making it so cumbersome that people just ignore the assignment. PS-Thank you for prompt responses, posting of grades, and general attention to detail. It seems as if you put a lot of work into each class, both before, during, and after, and it shows."

"I like that there aren't too many questions and some questions are fun, like the miso soup one. I wish you addressed all the questions we ask at the end though, I want to know the answer to my questions but you only select a few to go over."

"I think the online questions could be used better. I don't understand why there aren't study quizzes online that let us know our score. It seems like a hassle and time sink to do all the flashcard questions, email them to you, then wait for a response about how we did."

"[enter funny comment here]"

"its cool that its graded on compleation, and that they give a little heads up for the upcoming week."

20110909

Astronomy flashcard question: partial lunar eclipse

Astronomy 210, fall semester 2011
Cuesta College, San Luis Obispo, CA

Students were asked near the end of their learning cycle the following think-pair-share question, to be answered using flashcards.

Consider a side view of Earth and its shadow zones, the location of an observer on Earth, and the moon. The sun is located to the left, far off of the page. Which view does this observer see?

Section 70160 (pre-)
(A) : 8 students
(B) : 1 student
(C) : 1 student
(D) : 13 students
(E) : 4 students

This question was asked again after students were instructed to discuss with a neighbor how they chose their answer, and to convince each other why their answer is (in)correct.

Section 70160 (post-)
(A) : 0 students
(B) : 0 students
(C) : 0 students
(D) : 24 students
(E) : 4 students

Correct answer: (D)

Note that (A) is the view of Earth, as seen by an observer located somewhere on the northern hemisphere of the near side of the moon.

Pre- to post- peer-interaction gains:
pre-interaction correct = 48%
post-interaction correct = 86%
Hake (normalized) gain <g> = 73%

20110908

Astronomy flashcard question: total lunar eclipse

Astronomy 210, fall semester 2011
Cuesta College, San Luis Obispo, CA

Students were asked near the end of their learning cycle the following think-pair-share question, to be answered using flashcards.

While an observer in Seattle, WA is seeing a total lunar eclipse, an observer in San Luis Obispo, CA would see:
(A) a total lunar eclipse.
(B) a partial lunar eclipse.
(C) a normal full moon.
(D) (None of the above choices, as the moon would not be visible.)
(E) (Unsure/guessing/lost/help!)

Section 70160 (pre-)
(A) : 6 students
(B) : 10 students
(C) : 4 students
(D) : 0 students
(E) : 7 students

This question was asked again after students were instructed to discuss with a neighbor how they chose their answer, and to convince each other why their answer is (in)correct.

Section 70160 (post-)
(A) : 15 students
(B) : 12 students
(C) : 0 students
(D) : 0 students
(E) : 1 student

Correct answer: (A)

This was also asked as a midterm essay question in a previous semester.

Pre- to post- peer-interaction gains:
pre-interaction correct = 22%
post-interaction correct = 54%
Hake (normalized) gain <g> = 41%

20090409

Astronomy clicker question: star cluster lookback time and evolution rates

Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the beginning of their learning cycle:


Which star's light takes the shortest time to travel to us?
(A) O5 star.
(B) B0 star.
(C) A5 star.
(D) (There is a tie.)
(E) (I'm lost, and don't know how to answer this.)

Section 30674 (pre-)
(A) : 12 students
(B) : 2 students
(C) : 1 student
(D) : 6 students
(E) : 3 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30674 (post-)
(A) : 10 students
(B) : 0 students
(C) : 0 students
(D) : 13 students
(E) : 1 student

Correct answer: (B)

Since these stars are in the same cluster, and are all located at the same distance away, light from all three stars will take the same amount of time to travel to us.

Pre- to post- peer-interaction gains:
pre-interaction correct = 25%
post-interaction correct = 54%
Hake (normalized) gain <g> = 39%

[Follow-up question.]
Which star's supernova explosion (type II or type Ia) was/will be observed last by us?
(A) O5 star.
(B) B0 star.
(C) A5 star.
(D) (There is a tie.)
(E) (I'm lost, and don't know how to answer this.)

Section 30674 (pre-)
(A) : 1 students
(B) : 2 students
(C) : 18 students
(D) : 1 students
(E) : 3 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30674 (post-)
(A) : 2 students
(B) : 0 students
(C) : 21 students
(D) : 0 students
(E) : 2 students

Correct answer: (C)

Massive stars will have shorter main sequence lifetimes, while low-mass stars will have longer main sequence lifetimes. Since these stars are located in the same cluster, and thus were born at the same time, and are located the same distance away from us, the lowest-mass star will be seen to end its main sequence lifetime last.

Pre- to post- peer-interaction gains:
pre-interaction correct = 72%
post-interaction correct = 84%
Hake (normalized) gain <g> = 43%

20090328

Astronomy clicker question: they might be giants

Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) in the middle of their learning cycle:

A __________ main sequence star will eventually become a giant.
(A) massive.
(B) medium-mass.
(C) low-mass.
(D) (More than one of the above choices.)
(E) (None of the above choices.)
(F) (I'm lost, and don't know how to answer this.)

Section 30674 (pre-)
(A) : 5 students
(B) : 19 students
(C) : 13 students
(D) : 4 students
(E) : 3 student
(F) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30674 (post-)
(A) : 0 students
(B) : 32 students
(C) : 10 students
(D) : 1 student
(E) : 1 student
(F) : 0 students

Correct answer: (B)

A medium-mass main sequence star will become a giant when it depletes the hydrogen in its core, and the outer layers will eventually be ejected as a planetary nebula, with a white dwarf exposed at its center.

Pre- to post- peer-interaction gains:
pre-interaction correct = 43%
post-interaction correct = 72%
Hake (normalized) gain <g> = 52%

20090228

Astronomy clicker question: Doppler shifted absorption spectra

Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

Which absorption spectrum corresponds to a star moving towards the Earth? (The arrows indicate the expected wavelength values for a stationary star of the same type.)

(N.b.: (E) is the "I'm lost, and don't know how to answer this" response.)

Section 30674 (pre-)
(A) : 17 students
(B) : 10 students
(C) : 1 student
(D) : 1 student
(E) : 2 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30674 (post-)
(A) : 23 students
(B) : 7 students
(C) : 0 students
(D) : 0 students
(E) : 1 student

Correct answer: (A)

For a source moving towards away from an observer, all absorption wavelengths are redshifted ("stretched") to slightly longer values. Note that the rightmost absorption line in spectra (B) is not even shifted at all (likewise, the leftmost absorption line in spectra (D) is unshifted as well).

Pre- to post- peer-interaction gains:
pre-interaction correct = 55%
post-interaction correct = 74%
Hake (normalized) gain <g> = 43%

20090227

Astronomy clicker question: photon energy requirement

Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

A photon with slightly more energy than is required for an electron to move between energy levels 1 -> 2 would:
(A) be absorbed, causing the electron to move between energy levels 1 -> 2.
(B) not be absorbed, such that the electron stays in energy level 1.
(C) (Not enough information is given to answer this.)
(D) (I'm lost, and don't know how to answer this.)

Section 30674 (pre-)
(A) : 17 students
(B) : 10 students
(C) : 4 students
(D) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30674 (post-)
(A) : 12 students
(B) : 17 students
(C) : 2 students
(D) : 0 students

Correct answer: (B)

A photon must have exactly the right amount of energy in order to be absorbed by an electron and cause the electron to make an orbital transition. "No more, no less."

Some students persistent in believing that an electron could absorb a photon with more than enough energy required. However in the quantum world: "Exact change only."

Pre- to post- peer-interaction gains:
pre-interaction correct = 32%
post-interaction correct = 55%
Hake (normalized) gain <g> = 33%

20090210

Astronomy clicker question: planet orbit position

Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

Consider the view of the eastern horizon shown below, as seen from San Luis Obispo, CA at a certain date/time. Carefully note the positions of the Sun, and an unknown planet.


Which of planetary positions (A)-(E) shown below corresponds to the planet shown above? (This drawing is not to scale, and orbits have been simplified as circles instead of ellipses.)

(F) = (I'm lost and don't know how to answer this.)

Section 30676 (pre-)
(A) : 6 students
(B) : 1 student
(C) : 25 students
(D) : 7 students
(E) : 2 students
(F) : 4 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 30676 (post-)
(A) : 0 students
(B) : 0 students
(C) : 43 students
(D) : 1 student
(E) : 0 students
(F) : 1 student

Correct answer: (C)

Since the Sun is in the east, this is sunrise (6 AM), and the planet is found near the west horizon, away from the Sun.

Pre- to post- peer-interaction gains:
pre-interaction correct = 56%
post-interaction correct = 96%
Hake (normalized) gain <g> = 90%

Section 30674 (pre-)
(A) : 2 students
(B) : 0 students
(C) : 14 students
(D) : 3 students
(E) : 10 students
(F) : 2 students

Section 30674
(A) : 0 students
(B) : 0 students
(C) : 31 students
(D) : 0 students
(E) : 0 students
(F) : 0 students

Pre- to post- peer-interaction gains:
pre-interaction correct = 45%
post-interaction correct = 100%
Hake (normalized) gain <g> = 100%

20081124

Astronomy clicker question: reionization

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

__________ is/are evidence of reionization in the early universe.

(A) Galaxy redshifts are proportional to galaxy distances.
(B) The near zero curvature of space-time.
(C) The amounts of helium and lithium in extremely old stars.
(D) Extremely distant galaxies surrounded by neutral hydrogen gas.
(E) The cosmic microwave background.
(F) (None of the above choices.)
(G) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 4 students
(B) : 1 student
(C) : 3 students
(D) : 10 students
(E) : 8 students
(F) : 0 students
(G) : 0 students

Correct = 38%

Correct answer: (D)

Reionization occurred when the first generation of stars formed the first galaxies, at the end of the dark ages. The light from these stars ionized hydrogen around them, creating emission nebulae.

20081123

Astronomy clicker question: main sequence to neutron star evolution

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

A __________ main sequence star will eventually become a neutron star.
(A) massive.
(B) medium-mass.
(C) low-mass.
(D) (More than one of the above choices.)
(E) (None of the above choices.)
(F) (I'm lost, and don't know how to answer this.)

Section 70158
(A) : 33 students
(B) : 9 students
(C) : 1 students
(D) : 0 students
(E) : 0 students

Correct = 74%

Correct answer: (A)

Massive stars main sequence stars will become supergiants, undergo type II supernovae explosions, and then can either become black holes or neutron stars, depending on the mass of the remaining core.

Section 70160
(A) : 22 students
(B) : 3 students
(C) : 1 student
(D) : 0 students
(E) : 0 students

Correct = 85%

20081122

Astronomy clicker question: extremely young cluster stars

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

__________ will be found in an extremely young star cluster.
(A) Supergiants.
(B) Red dwarfs.
(C) White dwarfs.
(D) Blue-hot main sequence stars.
(E) Yellow-hot main sequence stars.
(F) (More than one of the above choices.)
(G) (I'm lost, and don't know how to answer this.)

Section 70158 (pre-)
(A) : 20 students
(B) : 6 students
(C) : 6 students
(D) : 5 students
(E) : 2 students
(F) : 4 students
(G) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 70158 (post-)
(A) : 0 students
(B) : 6 students
(C) : 6 students
(D) : 22 students
(E) : 5 students
(F) : 4 students
(G) : 0 students

Correct answer: (D)

Massive stars (blue-hot main sequence stars, which become supergiants) evolve faster than medium mass stars (yellow-hot main sequence stars, which become giants, then white dwarfs), which evolve faster than low mass stars (red dwarfs). Thus blue-hot main sequence stars will be the youngest type of stars, and be found in extremely young stars clusters.

Pre- to post- peer-interaction gains:
pre-interaction correct = 12%
post-interaction correct = 51%
Hake (normalized) gain <g> = 45%

Section 70160 (pre-)
(A) : 10 students
(B) : 2 students
(C) : 0 students
(D) : 4 students
(E) : 1 student
(F) : 9 students
(G) : 0 students

Section 70160 (post-, after students were directed to not pick (F))
(A) : 20 students
(B) : 1 student
(C) : 5 students
(D) : 5 students
(E) : 0 students
(F) : 0 students
(G) : 0 students

Pre- to post- peer-interaction gains:
pre-interaction correct = 15%
post-interaction correct = 16%
Hake (normalized) gain <g> = 1%

20081121

Astronomy clicker question: same luminosity main sequence vs. giant star

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

A main sequence star will be ___________ compared to a giant star that has the same luminosity.
(A) cooler and smaller.
(B) cooler and larger.
(C) hotter and smaller.
(D) hotter and larger.
(E) (I'm lost, and don't know how to answer this.)

Section 70158 (pre-)
(A) : 11 students
(B) : 2 students
(C) : 31 students
(D) : 2 students
(E) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 70158 (post-)
(A) : 3 students
(B) : 0 students
(C) : 38 students
(D) : 3 students
(E) : 0 students

Correct answer: (C)

From an H-R diagram, main sequence stars are hotter than giants that have the same luminosity. From the Stefan-Boltzmann law (luminosity proportional to size and temperature^4), since the main sequence star has the same luminosity as, but is hotter than the giant, then the main sequence star must be smaller in size.

Pre- to post- peer-interaction gains:
pre-interaction correct = 67%
post-interaction correct = 86%
Hake (normalized) gain <g> = 58%

Section 70160 (pre- only)
(A) : 3 students
(B) : 0 students
(C) : 22 students
(D) : 1 student
(E) : 0 students

Correct = 85%

20081105

Astronomy clicker question: spiral arm with supergiants and red dwarfs

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

It is possible for red dwarfs and supergiants to be found within the same spiral arm if:
(A) they began their main sequence lives in different spiral arms.
(B) the supergiants have already exploded as type II supernovae, but this light has not yet reached the Earth.
(C) they contain different concentrations of metals (elements heavier than hydrogen and helium).
(D) they are both remnants of medium mass main sequence stars.
(E) (I'm lost, and don't know how to answer this.)

Section 70158
(A) : 25 students
(B) : 7 students
(C) : 6 students
(D) : 13 students
(E) : 1 student

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 70158
(A) : 38 students
(B) : 5 students
(C) : 3 students
(D) : 8 students
(E) : 0 students

Correct answer: (A)

Massive stars live for a brief amount of time, evolving rapidly from protostars to main sequence stars to supergiants to type II supernovae. At the other extreme, low mass stars live for an inordinately long time, evolving from protostars to the main sequence, where they all still exist to this day as red dwarfs. So in order for a supergiant to be located in the same spiral arm as a red dwarf, they must have been born in separate locations--the massive star is born, lives, and dies within the same spiral arm, while the red dwarf is on its nth round trip, passing through the spiral arm. Responses (B) and (C) are not an important factors, while response (D) is obviously false.

Pre- to post- peer-interaction gains:
pre-interaction correct = 48%
post-interaction correct = 70%
Hake (normalized) gain <g> = 43%

Section 70160 (pre-)
(A) : 14 students
(B) : 7 students
(C) : 3 students
(D) : 4 students
(E) : 0 students

Section 70160 (post-)
(A) : 20 students
(B) : 8 students
(C) : 0 students
(D) : 0 students
(E) : 0 students

Pre- to post- peer-interaction gains:
pre-interaction correct = 50%
post-interaction correct = 71%
Hake (normalized) gain <g> = 43%

20081104

Astronomy clicker question: Milky Way mass

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

The total mass of the Milky Way can be estimated by:
(A) observing how quickly or slowly stars at different distances orbit its center.
(B) observing how quickly the supermassive black hole at its center is growing.
(C) carefully counting all the stars in the night sky.
(D) timing all of the Cepheid variable stars in the halo.
(E) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 14 students
(B) : 6 students
(C) : 0 students
(D) : 7 students
(E) : 0 students

Correct answer: (A)

Kepler's third law would be used to determine the total mass of the Milky Way. (This clicker question sets up the introduction of dark matter.) Response (D) would determine the luminosity of the Cepheid variable stars, from which the their distances could be found, resulting in the distance of the sun from the center of the Milky Way. Response (B) is a somewhat fanciful notion.

20081030

Astronomy clicker question: helium fusion stars

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

__________ stars will be able to fuse helium.
(A) Massive.
(B) Medium-mass.
(C) Low-mass.
(D) (More than one of the above choices.)
(E) (None of the above choices.)
(F) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 3 students
(B) : 8 students
(C) : 4 students
(D) : 10 students
(E) : 1 student
(F) : 1 student

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 70160
(A) : 1 student
(B) : 2 students
(C) : 0 students
(D) : 25 students
(E) : 0 students
(F) : 0 students

Correct answer: (D)

Low-mass stars (red dwarfs) will never get hot enough to fuse helium. Both medium mass and massive stars will eventually fuse helium in their giant and supergiant stages, respectively.

Clarification from one student who wanted all (A), (B), and (C) choices incorporated in his (D) reply: "I thought the question meant which stars make helium." (I.e., does "bake a cake" refer to making a cake from ingredients, or taking a finished cake and putting it into the oven?)

Pre- to post- peer-interaction gains:
pre-interaction correct = 37%
post-interaction correct = 89%
Hake (normalized) gain <g> = 83%

20081028

Astronomy clicker question: isolated white dwarf--nova?

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle:

An isolated white dwarf cannot explode as a nova because it:
(A) has no companion star to heat up.
(B) expended all of its extra energy during the planetary nebula phase.
(C) has no new source of hydrogen.
(D) does not have enough degeneracy pressure.
(E) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 15 students
(B) : 2 students
(C) : 10 students
(D) : 0 students
(E) : 0 students
(F) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results. No comments were made by the instructor, in order to see if students were going to be able to discuss and determine the correct answer among themselves.

Section 70160
(A) : 9 students
(B) : 0 students
(C) : 19 students
(D) : 0 students
(E) : 0 students
(F) : 0 students

Correct answer: (C)

A white dwarf in a close binary system will take hydrogen from its companion star, and if this mass transfer is sufficiently slow, will undergo a nova explosion. (A rapid mass transfer would result in a type Ia supernova explosion.)

Pre- to post- peer-interaction gains:
pre-interaction correct = 37%
post-interaction correct = 68%
Hake (normalized) gain <g> = 49%

20081025

Astronomy clicker question: very young star cluster

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle, during a review session before a midterm:

__________ will be found in an extremely young star cluster.
(A) Supergiants.
(B) White dwarfs.
(C) Red dwarfs.
(D) (More than one of the above choices.)
(E) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 17 students
(B) : 2 students
(C) : 1 student
(D) : 6 students
(E) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results.

Section 70160
(A) : 15 students
(B) : 0 students
(C) : 0 students
(D) : 10 students
(E) : 0 students

Correct answer: (A)

Low-mass protostars take a very long time to become a main sequence star; while massive protostars will take a very short time to reach a main sequence, live out its main sequence lifetime, and then become a supergiant. In-between are medium mass main sequence stars, which become giants, planetary nebulae, and then white dwarfs.

During the instructor-facilitated discussion following the second round of clickers, students who selected (D) said that a very young star cluster would have both supergiants and white dwarfs--which was then immediately shouted down by their fellow students.

Pre- to post- peer-interaction gains:
pre-interaction correct = 65%
post-interaction correct = 60%
Hake (normalized) gain = -16%

20081024

Astronomy clicker question: young or old star cluster?

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle, during a review session before a midterm:

The H-R diagram of a star cluster shown at right shows:
(A) stars that are all old.
(B) stars that are all young.
(C) stars that are a mixture of young and old stars.
(D) (This H-R diagram is not possible for a star cluster.)
(E) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 12 students
(B) : 1 student
(C) : 11 students
(D) : 1 student
(E) : 0 students

This question was not asked again after displaying the tallied results, but was discussed with the whole class with the instructor facilitating students who gave opinions on either (A) or (C).

Correct answer: (A)

Low-mass protostars take a very long time to reach the main sequence; while massive stars take a very short time to reach the main sequence. Low-mass stars also never leave the main sequence (this is yet to happen, and would require about three times the current age of the universe).

Some students had thought that the massive main sequence stars signaled a young star cluster, while the low-mass stars had left the main sequence, indicating a very old star cluster.

Student: "All stars in a star cluster have to be the same age!"

Pre- to post- peer-interaction gains: (N/A)

20081009

Astronomy clicker question: speed of electromagnetic radiation

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle, during a review session before a midterm:

Which type of electromagnetic radiation wave travels with the slowest speed?
(A) Gamma rays.
(B) X rays.
(C) Microwaves.
(D) TV.
(E) (All travel at same speed.)
(F) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 3 students
(B) : 5 students
(C) : 7 students
(D) : 8 students
(E) : 7 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results.

Section 70160
(A) : 3 students
(B) : 1 student
(C) : 0 students
(D) : 23 students
(E) : 3 students

Correct answer: (E)

All forms of electromagnetic radiation travel with the same speed!

Pre- to post- peer-interaction gains:
pre-interaction correct = 23%
post-interaction correct = 10%
Hake (normalized) gain = -17%

20081008

Astronomy clicker question: hours of daylight

Astronomy 210, Fall Semester 2008
Cuesta College, San Luis Obispo, CA

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the end of their learning cycle, during a review session before a midterm:

If the Sun rises in the southeast horizon, as seen by an observer in San Luis Obispo, CA, how many hours will there be before the Sun sets on that day?
(A) Less than 12 hours.
(B) Approximately 12 hours.
(C) More than 12 hours.
(D) (The sun will not set below the horizon on that day.)
(E) (I'm lost, and don't know how to answer this.)

Section 70160
(A) : 15 students
(B) : 7 students
(C) : 7 students
(D) : 0 students
(E) : 0 students

This question was asked again after displaying the tallied results with the lack of consensus, with the following results.

Section 70160
(A) : 26 students
(B) : 0 students
(C) : 1 student
(D) : 0 students
(E) : 0 students

Correct answer: (A)

The Sun will set in the southwest later that day, meaning that this is some date between the autumnal equinox and the vernal equinox, thus there will be less than 12 hours of daylight from sunrise to sunset.

Pre- to post- peer-interaction gains:
pre-interaction correct = 51%
post-interaction correct = 96%
Hake (normalized) gain = 92%