1. An Assessment
Best procedures: read quietly to yourself (so you don’t give any subconscious clues)
As the instructor, we read it too, for timing, then ask if anyone needs more time
If not, it’s time to vote simultaneously—use your fingers, right in front of your chest so others don’t see (anonymous)
In which case(s) can the Earth, Sun, and Moon be in a straight line, as seen from above the solar system?
full Moon only
first quarter and third (or last) quarter
new Moon only
both full and new Moon
This can happen at any phase of the Moon.

2. Percentage illuminated
Examine the data for the percentage of the Moon’s near side illuminated for the following dates.
What lunar phase
will occur on Feb 13?
waning crescent
full
at or very near first quarter
at or very near new
any of the above, depending upon other factors.
Date
Percentage illuminated
Feb 1
24%
Feb 2
15%
Feb 3 8%
Feb 4 3%
Feb 5 0%
Feb 6 1%
Feb 7 5%

3. Which motions cause the Moon’s phases?
Earth’s rotation on its axis.
Earth’s orbit around the Sun.
The Moon’s rotation on its axis.
The Moon’s orbit around the Earth.
a and c
a, b, and d
b and d
c and d d