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Surface
Features
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Light areas
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heavily cratered
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highlands
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more
than 4 billion years old
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Dark areas
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Maria (seas)
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fewer craters
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about
3.5 billion years old
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water cannot exist on the
surface of the moon
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Cooperative learning experiment:
-
150 visible meteor craters
on the earth
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1000s on the moon
-
assume constant bombardment
by meteors
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List the surfaces in order
of age
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