Cuesta College, San Luis Obispo, CA
It is remarked that if you are busy in Ukraine, you would typically work from sunrise to moonrise[*]. Discuss what phase the moon would have when rising to signal the end of an approximately 18 hour work shift that began at sunrise. Support your answer using a diagram showing the positions of the sun, moon, Earth, and an observer on Earth.
[*] The Week, volume 5, issue 212, p. 48-49.
Solution and grading rubric:
- p:
Correct. Assuming sunrise at 6 AM, then end of an 18 hour work shift would be at 12 AM midnight. "Phase 7," or the "third quarter moon," or the "last quarter moon" would rise at midnight. - r:
Nearly correct (explanation weak, unclear or only nearly complete); includes extraneous/tangential information; or has minor errors. At least clearly indicates that end of workshift is midnight, but has slightly incorrect phase for moonrise on east horizon at that time. - t:
Contains right ideas, but discussion is unclear/incomplete or contains major errors. As (r), but chooses full moon, which is directly overhead at midnight. - v:
Limited relevant discussion of supporting evidence of at least some merit, but in an inconsistent or unclear manner. - x:
Implementation/application of ideas, but credit given for effort rather than merit. - y:
Irrelevant discussion/effectively blank. - z:
Blank.
Section 4160
p: 10 students
r: 4 students
t: 12 students
v: 12 students
x: 1 student
y: 0 students
z: 0 students
A sample of a "p" response (from student 2887) is shown below:
Another "p" response (from student 4607) decries the hardships of the Ukraine work ethic:
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