Heat Transfer

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Heat Transfer
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Types of Heat Transfer

• Heat is transferred in the mantle through
  radiation, conduction and convection
• Radiation is the movement or transfer of heat
  through empty space (like warming by a fire)
• Conduction is the transfer of heat by direct
  contact. (touching a hot mug)
• Convection is heat transferred by the movement of
  heated liquid or air (roasting marshmallows over
  a fire)

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Convection Currents

• Hot magma in the Earth moves toward the surface,
  cools, then sinks again.
• Creates convection currents beneath the plates
  that cause the plates to move.

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Question...

• How is a convection current formed?

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Discussion

• What other science units would you find
  convection currents?