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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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Geography, 22.06.2019 21:30
Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.
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Geography, 23.06.2019 23:30
The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates
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Geography, 24.06.2019 11:30
In africa what do they call a crop grown for direct sale and not for use?
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You are on Mount Helix and photograph the sunset at 6:00 pm. You notice the full Moon rises at the s...
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