MWJL+1.2

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Vocabulary

 * Heat Transfer**-Movement of energy from a warm to a cooler object.
 * Radiation**-Transfer of energy through empty space.
 * Conduction**-Transfer by direct contact of particles.
 * Convection**-Transfer by the movement of a heated movement.
 * Density**-A measure of how much mass there is in a volume of a substance.
 * Convection Current**-Flow that transfers heat with a fluid.

Outline

 * ===Heat Transfer===
 * Radiation
 * Convection
 * Convection current
 * Take soup for example......
 * The more warm soup flows to the top.
 * The cooler soup sinks down.
 * Cooler soup more dense
 * More warm soup less dense.
 * Keeps going;constant flow.
 * Conduction
 * ===Convection in Earth's mantle===
 * Earth's mantle responds to heat.
 * Same thing happens in the Earth's mantle.
 * Cooler soup sinks
 * More warm soup flows to the top.
 * Convection currents have been flowing inside Earth for more than 4 billion years.

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