Would it be possible for you to observe the dark side of the moon if you were watching the night sky every night for an entire lunar cycle ? Why or why not ?

Yes it would.

Explanation:

The phases of earth would be the exact opposite of those of the moon. When an observer on earth sees a full moon, an observer on the moon would see a "new earth." That is, from the moon, the earth would seem very close to the sun in the sky, and therefore, all but invisible.

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the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.