TeXes Science Practice Test

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The term "maria" refers to which features on the Moon?

  1. Highlands

  2. Dark, smooth regions

  3. Craters

  4. Valleys

The correct answer is: Dark, smooth regions

The term "maria" specifically refers to the dark, smooth regions found on the Moon's surface. These areas were formed by ancient volcanic eruptions that filled large basins with basalt, which is a type of volcanic rock. As a result, the maria are generally less cratered than the more rugged highlands of the Moon, indicating they are younger geological features. The smooth, dark appearance contrasts sharply with the lighter, more heavily cratered highlands, making the maria an easily identifiable characteristic of the lunar landscape. This understanding is essential for interpreting the Moon's geological history and surface processes.

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