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Physics, 09.12.2019 09:31 cheesecake1919

What is mantle convection?
a. cool matter rises and heats up and then falls and cools again and again, sometimes it will be erupted out of volcanoes
b. cool matter falls and heats up and rises and cools again and again, sometimes it will erupt out of volcanoes
c. cool matter rises and cools even more and then falls and heats up again and again, sometimes erupting from volcanoes

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What is mantle convection?
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