Earth
What is the test that can help determine the hardness of a rock called?
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If an organic material is converted into stone, it becomes what?
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78% of the earth's atmosphere is composed of which gas?
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Which is the process of placing plants in a certain way in an area?
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What is the area on one side of a mountain that receives little rain called?
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What branch of science deals with fossils of living things?
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Which of these islands is not considered a "hot spot", according to plate tectonic theory?
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In which U.S. state was the prehistoric proglacial lake Glacial Lake Missoula located?
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