1.) when the moon is waning, the sunlit area is said to be getting smaller.

a
true

b
false

2.) just as earth moves around the sun, the moon revolves around earth. about how many earth days does it take for the moon to travel around earth?

a
about 7 days

b
about 365 days

c
about 180 days

d
about 28 days

3.) a satellite is an object that revolves around a larger object. many satellites are orbiting earth. which of the following is an important factor in keeping a communications satellite in orbit around earth?

a
gravity

b
light

c
heat

d
magnetism