Convection and the Mantle Convection and the Mantle

Convection and the Mantle

Convection and the Mantle • There are 3 main types of heat transfer: radiation, conduction, convection

Heat Transfer - Radiation • Radiation – transfer of energy through empty space, has no direct contact between the heat source and an object (Ex: sunlight warming Earth’s surface)

Heat Transfer - Conduction • Conduction – heat transfer by direct contact of particles of matter (Ex: metal spoon heating up in a pot of hot soup)

Heat Transfer - Convection – transfer of heat by the movement of a heated fluid (includes liquids and gases); Heat transfer is caused by differences in temperature and density within a fluid (Ex: Water on a stove – water heats at the bottom of the pan, becomes less dense and rises; away from the heat source the water cools, becomes more dense and sinks; the process begins again) This is a Convection Current, or flow that transfers heat. Density – measure of how much mass there is in a volume of a substance

Convection and Density

Convection Currents

Next…. COMPLETE AND PUT THE NEXT GRAPHIC ORGANIZER IN YOUR NOTEBOOK!

Convection Currents in the Mantle The heat source is the Earth’s core and from the mantle itself. These currents have been acting like a conveyor belt moving the lithosphere above for the past four billion years

Convection Currents, A to D

Convection Currents