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11 years ago
How do the size and chemical composition of a planet determine its internal temperature?
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11 years ago
Size is the most important factor in determining how rapidly a planet loses its internal heat. The larger a planet is, the deeper is the "insulation" that surrounds the core and keeps in the heat. The chemical composition of a planet determines the amount of radioactive elements present. Currently the terrestrial planets' primary source of heat is radioactivity.
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