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Geography, 22.06.2019 14:40, thezbell
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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Geography, 23.06.2019 05:00, Bgreene2377
Which of the following statements about wearher along mountain ranges is correct
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Geography, 23.06.2019 06:40, hlgerardip4wbhx
Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.
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Whats an example of a bering land bridge...
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