Why Are Almost All the Craters We See on the Moon

question 21

Multiple Choice

Why are almost all the craters we see on the Moon circular?

• A) because the rocks and icebergs that fell from space to make them were all spherical
• B) because the volcanoes that make them erupt in a symmetrical way, making circular openings for the lava to emerge
• C) because the active surface of the Moon converts the craters into circular basins, no matter what shape they start out being
• D) because the rocks and icebergs that hit the Moon are moving so fast, they explode on impact, making a circular hole
• E) this is an unsolved mystery; it's one of the most puzzling things about the Moon

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