Chapter 1-2 Convection and the Mantle

 Heat always moves from warmer to cooler  Three types of heat transfer  Radiation – transfer of energy through space  No direct contact between heat source and object  Ex. Sunlight, heat from an open fire

 Conduction – transfer within a material or between materials touching  Ex. Metal spoon in a pot of hot soup – you touch the spoon and the heat conducts from the spoon to your skin.  Convection – transferred by the movement of fluids.  Movement of currents within a fluid Figure 8, p. 15

 Convection Current – the flow that transfers heat within a fluid  Continue as long as heat is added.  Heat from the core and the mantle itself causes convection currents in the mantle. Figure 9, p. 16

 Heat from the core and the mantle cause convection currents in the mantle.  The mantle flows very slowly  Heats up at the bottom of the mantle, rises up, cools, sinks back down. Figure 10, p. 17