Earth
What are ridges of rock debris caused by glacial action called?
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What produces more energy than all the world's nuclear weapons combined?
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What is the study of atmospheric conditions and climate called?
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What is the test that can help determine the hardness of a rock called?
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Which of these is the first step in the making of a fossil?
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What is the mountain range that separates Spain from France?
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What is the theory that describes how the continents got where they are today?
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