SKKH+1.2

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Vocabulary:

 * Heat Transfer-**movement of energy from a warmer object to a cooler object
 * Radiation//-//**energy transfer through empty space
 * Convection//-//**heat transfer by movement of a heated fluid
 * Conduction//-//**heat transfer by direct contact of matter
 * Density-**how much mass in a volume of a substance
 * Convection Current//-//**flow which transfers heat within a fluid

**Outline**

 * ===Convection currents and the Mantle===
 * ===Radiation===
 * The transfer of energy through empty space is called radiation.Sunlight is radiation that warms Earth's surface.Heat transfer by radiation takes place with no direct contact between a heat source and an object.Forms of radiation include the heat you feel around a flame or an open fire.
 * ===Conduction===
 * Heat transfer by direct contact of particles of matter is called conduction.
 * ===-Convection===


 * Convection is heat transfer by the the movement of a heated fluid.During convection heated particles of a fluid begin to flow,transfering heat energy from one part of the fluid to another.Heat transfer through convection is caused by differences of temperature and density within a fluid.
 * ===-Convection in Earth's Mantle===


 * The heat source for the convection currents in the asthnosphere is heat from Earth's core and from the mantle itself.