The dark areas on the moons surface are called maria,
Chapter 18, Problem Q18.29(choose chapter or problem)
The dark areas on the moons surface are called maria, Latin for seas, and were once thought to be bodies of water. In fact, the maria are not seas at all, but plains of solidified lava. Given that there is no atmosphere on the moon, how can you explain the absence of liquid water on the moons surface?
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