UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During Earth’s formation, how did Earth become hot enough to be nearly molten? Choose all that apply.
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gravity
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collisions of space materials
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radioactive decay of unstable materials
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clouds of gas and dust
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The sun’s radiation
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Explanation:
Detailed explanation-1: -Many of the rocks in Earth’s crust and interior undergo this process of radioactive decay . This process produces subatomic particles that zip away, and later collide with surrounding material inside the Earth. Their energy of motion is converted to heat.
Detailed explanation-2: -There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.
There is 1 question to complete.