Convection Currents and the Mantle

Convection Currents and the Mantle Heat Transfer Heat can transfer in 3 ways 1. Radiation Transfer of heat energy by electromagnetic radiation Example: waves on the EMS scale 2. Conduction Transfer of heat By direct Contact Example: touching a metal spoon In a pot of Boiling water 3. Convection Heat transfer By the movement Of heated liquids And gasses Example: Hot Air rises

Heat Transfer

Convection Currents and the Mantle Changing temperature causes the density to change: Hot liquid is less dense, moves up to the top Cool liquid is more dense, moves down to the bottom

Convection Currents and the Mantle Video The upper mantle is a soft liquid and experiences convection currents As the fluid close to the core heats, it rises to the top (near the lithosphere) and cools, causing it to cycle back down

Convection Currents and the Mantle Convention currents in the mantle, cause the lithosphere (bottom of the crust) to move This causes the crust of the earth to move around

Draw both pictures below in your notes Heat Becomes cool Heat rising Coolness sinking Heat source