ajor source of Earth's heat is radioactivity, the energy released when the unstable atoms decayans-The air molecules that come in contact with the WARM land and water molecules gain energy by conduction.ans-The Earth's crust is not a solid shell. It is made up of thick, interconnecting pieces called tectonic plates that fit together like a puzzle.ans-Plates at our planet's surface MOVE because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move.ans-Convergent boundaries are areas where plates move toward each other and collide. These are ALSO known as compressional or destructive boundaries. ans-Radiation is the least important mode of heat transport in the Earth. The process of heat exchange between the SUN and the Earth, through radiation, controls the temperatures at the Earth's surface.ans-The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years (Fig.ans-Convection currents within Earth's mantle form as material near the core heats up. As the core heats the bottom layer of mantle material, particles move more rapidly, decreasing its density and causing it to RISE. ... At the bottom of the mantle, the material travels horizontally and is heated by the coreans-Heat transfer occurring due to mass movement of fluids (e.g., sensible heat transfer between water surface and overlying air). I have write in order I told this becoz u have write questions up and down but I have write in correct order for ex 1 questions answer is 1 answer so I have wrote accordinglyfollow me and make my answer brainlist plz plzzzzzzz plzzzzzzz