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Title: How do the size and chemical composition of a planet determine its internal temp Post by: ppk on May 3, 2012 How do the size and chemical composition of a planet determine its internal temperature?
Title: Re: How do the size and chemical composition of a planet determine its internal temp Post by: lewis on May 6, 2012 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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