Astronomy 210 Quiz 2, Spring Semester 2010
Cuesta College, San Luis Obispo, CA
What would be seen by an observer on the side of Earth facing the moon, during a partial lunar eclipse?
(A) The entire sun blocked by a new moon.
(B) Part of the sun will be blocked by a new moon.
(C) A new moon that will not be big enough to entirely block the sun when it passes in front of it.
(D) A full moon that will appear a very, very dark brown-red.
(E) A dark shadow across part of a full moon.
(F) A full moon that will appear to be slightly dimmer than usual.
Correct answer: (D)
During a partial lunar eclipse, an observer on Earth will see the full moon partly in Earth's umbra and penumbra, where the umbra portion will be dark, while the penumbra portion will not be noticeably dimmer.
Section 30674
(A) : 1 student
(B) : 10 students
(C) : 4 students
(D) : 0 students
(E) : 28 students
(F) : 1 student
(Blank: 1 student)
Success level: 66% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.64
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