1. The occurrence of solar eclipses:

a. implies that the sun is closer to us than the moon.

b. proves that the sun and the moon have the same size.

c. implies that the moon is closer to us than the sun.

d. is expected to happen every month.

2. Suppose you are an astronaut on the moon. You are on the side of the moon that faces the earth. During this time, you witness a special eclipse, namely the earth moves in front of the sun.

a. Such a situation is not possible.

b. The earth is not big enough to cover the total sun, so it will be a partial eclipse.

c. You will lose radio communication with the earth during this time.

d. The moon will appear reddish dark as seem from earth during this time.

3. Do we have a lunar and a solar eclipse every month?

a. Yes

b. No

c. Not sure