The Moon formed __________.
A) shortly before the Earth.
B) about 4.5 billion years ago.
C) about 4.5 million years ago.
D) about 40 billion years ago.

Name: The Moon formed __________. A) shortly before the Earth. B) about 4.5 billion years ago. C) about 4.5 million years ago. D) about 40 billion years ago.
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Question

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The most widely accepted theory is that the Moon formed around 4.5 billion years ago as a result of a collision between Earth and a Mars-sized object called Theia.

The Moon Formed __________