Although It Is Not Yet Known Precisely How the Moon

question 239

Multiple Choice

Although it is not yet known precisely how the Moon formed, an important clue is provided by the fact that

• A) unlike Earth, the Moon has essentially no atmosphere.
• B) the hemisphere of the Moon facing Earth is different from the hemisphere facing away.
• C) the Moon is heavily cratered.
• D) Moon rocks and minerals have very similar isotopic compositions to those of Earth.