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Title:

Heat Transfer

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Heat Transfer & Convection Currents Heat Heat moves from areas of warmth to areas of cold Three ways heat can be transferred: Radiation Conduction Convection ... – PowerPoint PPT presentation

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Title: Heat Transfer


1
Heat Transfer Convection Currents
2
Heat
  • Heat moves from areas of warmth to areas of cold
  • Three ways heat can be transferred
  • Radiation
  • Conduction
  • Convection

3
Radiation
  • Transfers energy through
  • infrared waves (sun or fire)
  • Can move through EMPTY space
  • No direct contact between heat source and an
    object.
  • Example bonfire warming your face

Heat from a bonfire is an example of radiation
Heat given off from a light bulb is also a form
of radiation
4
Conduction
  • Transfers heat through DIRECT CONTACT of
    particles (solid to solid)
  • Example bare feet on hot pavement

A spoon heating up in a pot of soup!
The pan gets HOT because it is touching the HOT
burner on the stove!
5
Convection
  • Transfer of heat through the movement of FLUIDS
    and GASES
  • Example soup heating inside a pot
  • Movement is created by differences in DENSITY
  • Hot things less dense rise to the top
  • Cold things more dense fall to the bottom

6
Convection
  • Example Lava Lamp

Cools off! more dense fall to the bottom
Hot! less dense rise to the top
7
Convection currents
  • Convection currents occur in Earths mantle
  • These currents are the force behind the movement
    of Earths plates
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