KHAY+1.2

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**Vocabulary**

 * Heat Transfe**r:movement of energy from a warmer substance to a cooler substance
 * Radiation:**transfer of energy through empty space
 * Conduction**:heat transfer by direct contact of particles
 * Convection**:heat transfer by the movement of a heated fluid
 * Density**:a measure of how much mass is in an object
 * Convection Current**:the flow that transfers heat within a fluid

Radiation

 * transfer of energy/heat
 * transfer through empty space

Conduction

 * transfer of energy/heat
 * transfer by direct contact

Convection

 * transfer of energy/heat
 * transfer by fluids
 * transfer by convection is caused by temperature and density
 * density is measure of mass in an object
 * hot fluids move faster than cold fluids
 * fluid is heated in a cycle due to convection currents
 * convection current is the flow that transfers heat within a fluid

Convection in the Earth's Mantle
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