Multiple choice

One theory of the Moon's origin is that the Earth, early in its development, was rapidly rotating body of molten rock in which most of the iron had settled to the core; some of this fluid was cast off from the surface of the spinning mass and later solidified to form the Moon.

Which of the following statements can be most directly inferred from the above?

  1. The Moon is the only sizeable heavenly body in orbit around the Earth.

  2. The Moon has proportionally less iron at its core than the Earth does.

  3. The surface of Moon solidified after the surface of the Earth did.

  4. Most of the fluid cast off from the Earth was dispersed into outer space.

  5. All matter on Earth in its early stages of development was in a liquid state.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 The earth could not have cast off much of iron in the formation of the moon, as the iron was lying at its core.

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