Both Earth's Moon and Mars Have Thick Layers of Loose

question 6

Multiple Choice

Both Earth's Moon and Mars have thick layers of loose surface materials. How are they different?

• A) They are different. Lunar regolith is mostly ejecta from impacts whereas Martian regolith is primarily wind- blown dust and sand on older surfaces that vary from water laid surfaces to volcanic surfaces.
• B) They are not different. They are both comprised primarily of ejecta from impacts that accumulates on the surface.
• C) They are not different. Both have surfaces that are remnant soils from a period when they had water on the surface.
• D) They are different. Lunar regolith is mostly ejecta from impacts, whereas Martian soil is more earthlike with classic soils developed by weathering of rock.

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