How well do you know the Moon? Take this twenty-question quiz and see! Don't worry, there are no grades on this quiz. Most of the answers can also be found in my book, The Big Splat.

15. Which rock type is very uncommon on Earth, but ubiquitous on the Moon?

(A) Impact breccias

(B) Volcanic basalt

(C) Marble

(D) Kimberlite (diamond-bearing rocks)

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