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Transferring Thermal Energy Section 2. Transfer of Thermal energy  Happens by two methods  Particles  Waves.

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Presentation on theme: "Transferring Thermal Energy Section 2. Transfer of Thermal energy  Happens by two methods  Particles  Waves."— Presentation transcript:

1 Transferring Thermal Energy Section 2

2 Transfer of Thermal energy  Happens by two methods  Particles  Waves

3 Conduction  The transfer of thermal energy by the collisions between particles of matter  Explain how a metal spoon is heated by a Bunsen burner  Air particles near flame  Particles in spoon nearest flame  Particles in spoon farthest from flame

4 Heat Conductors  The rate at which conduction occurs depends upon the type of material.  Heat moves faster in _____________  Heat moves slower or not at all in ___________

5 Convection  Liquids and gases are classified as fluids because _______________  Convection is the transfer of thermal energy by fluids  The movement of fluids from a _________ place to a _________ place.

6 Heat Transfer by Currents  What happens to fluids as the heat up?  Expand  Density  Rise  As they rise they cool off and then what happens?

7 Radiation  How does the energy from the sun get to the Earth?  Radiation is the energy transfer by electromagnetic waves  These waves travel through space or matter  Other examples

8 Controlling Heat Flow  How do you control heat flow?  How do animals in the artic control heat flow?  How do animals in the desert control heat flow?  What about the color of fur or skin?

9 Insulators  Insulators are materials the resist the flow of thermal energy  Air an excellent insulator  Metals are not  How does a thermos bottle work?


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