Answer:atmosphere
Explanation:Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.
Answer:
One of the most colorful images taken of the Moon, this NASA compilation shows shades of green and brown in addition to gray. Many Moon photos are actually color images! Unfortunately, unlike the planets, the Moon's surface has no brightly colored areas. Most of its color is a mix of dark browns, grays, or black.
Is it multiple choice?
If a moving object loses mass, how can it keep its momentum constant?
A. by speeding up
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