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?