2. 1.3 notes

3.  There are 3 types of heat transfer: radiation, conduction, and convection.  The transfer of energy through space is radiation. Sunlight is radiation that warms Earth’s surface.  Heat transfer within a material or between materials that are touching is conduction.  Heat that is transferred by the movement of fluids is convection.

6.  A convection current is the flow that transfers heat within a fluid.  Heating and cooling of a fluid, changes in the fluid’s density, and the force of gravity combine to set convection currents in motion.  Heat from the core and the mantle causes convection currents in the mantle.