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If a radioactive isotope has a half-life of 20 million year, and there is 25% remaining in the igneous rock. How old is the rock?
Answers: 1
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When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity
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What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen
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Biology, 22.06.2019 17:00, TheVariableWhoLived
As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?
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Label the following as inner or outer planets; a) has 67 moons made mostly of hydrogen and helium b) has rings c)no moons, high volcanic activity d) known as the red planet, has 2 moons e) very thin atmosphere, moons or rings
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If a radioactive isotope has a half-life of 20 million year, and there is 25% remaining in the igneo...
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