Q308
When was Mercurim formed?
A.
3.5 billion years ago
B.
4.5 billion years ago
AnswerC.
2.5 billion years ago
D.
None of these
Answer: Option B
Solution
Answer: Option B
Solution:
Mercury formed about 4.5 billion years ago when gravity pulled swirling gas and dust together to form this small planet nearest the Sun. Like its fellow terrestrial planets, Mercury has a central core, a rocky mantle, and a solid crust.