Heat in the mantle comes from the Earth's molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates.The temperature difference between the upper and lower boundaries of the mantle requires heat transfer to occur.
Material heating up in the mantle
Answer:
Because physical change are reversible change. we can reverse into the orginal effect.
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1,200,000,000,000
Multiple 10 to the power of 11
10x10x10x10x10x10x10x10x10x10x10=100,000,000,000
Then multiply by 12
Answer:
Explanation:
the forces between the molecules are stronger in solid than in liquids