Transfer of Heat Energy

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Transfer of Heat Energy

• Topic 5
• Energy in Earth Processes

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temperature

• A measurement of the average kinetic energy of
  the particles of a substance

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Heat

• Energy that is transferred from a hotter object
  to a cooler object because of a difference in
  temperature
• Infrared radiation is heat radiation

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radiation

• Energy transfer in the form of e-mag waves
• Examples
• Using microwave to heat food
• Warming yourself in front of a fire
• Energy from sun warming the Earth

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conduction

• Transfer of heat energy from particle to particle
  through contact when the particles collide
• Examples
• Spoon becoming hot in a bowl of soup
• Burning your hand on a hot stove
• Magma melting rocks it touches

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convection

• Transfer of heat by the circular motion of gases
  or liquids in convection cells or convection
  currents
• Caused by density differences/ temperature
  differences or unequal heating
• Examples
• Heating Earths atmosphere
• heating water in a pan
• Heating a house with a furnace

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Convection
Warmer, less dense water rises
Cooler, more dense water sinks
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