Why is the interior of the earth very hot? describe the earth's interior why it is hot
There are several reasons why the earth's interior is so much hotter than its surface. First, the earth was formed through gravitational compression of many particles; a portion of that original heat remains, trapped beneath the crust. Second, some of the heat in the middle layers of the interior are hot because the deeper core is cooling and releasing heat. Third, a major portion of the heat comes from radioactive decay. As unstable elements like uranium break down, they release heat. All of this combines, and, since all is trapped beneath a rocky mantle, much of the heat is simply contained there.
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