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Geography, 30.06.2019 03:20 jaircepeda053
Plate tectonics is responsible for climate change over millions of years. a.true b. false
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How much of the united states’ electric generation comes from coal? a. about 25% b. about 50% c. about 75% d. about 90%
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Geography, 22.06.2019 14:40
Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite
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Plate tectonics is responsible for climate change over millions of years. a.true b. false...
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