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Impact Cratering and Surface Age
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Astronomy
AST.144 Impact Cratering and Surface Age
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A same-scale comparison shows many craters in Mars's southern highlands and fewer craters in the northern plains. Which statement is best supported?
A
The southern highlands generally expose older terrain than the northern plains.
B
The northern plains are older because they have fewer craters.
C
Crater density cannot provide any relative-age clue on Mars.
D
Both regions must have identical ages because they share one atmosphere.
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