caption: Heating of the Terrestrial Planets
exif: {"Image DocumentName": "Heating of the Terrestrial Planets", "Image ImageDescription": "The interiors of the terrestrial planets are heated by. Gravitational potential energy of the accreting planetesimals are converted into thermal energy. Radioactive heating. Radioactive Heating. Radioactive materials (e.g., uranium, potassium, thorium) decay by emitting subatomic particles (alpha particle\u2014nuclei of helium, beta particle\u2013 electrons or positron, neutron, proton, etc.) and often gamma-ray, which collide with surrounding atoms, heating them up. Potassium-40 \u2192 Argon-40. Uranium-234 \u2192 \u2026\u2026. \u2192 Lead-206. Internal heating causes Mantle Convection---hot rock rises to the top and cools off, cool rock sinks to the bottom, resulting in the cooling of the planet\u2026", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}