Thermal Energy Transfer Radiation Conduction and Convection 1

Thermal Energy Transfer Radiation, Conduction, and Convection

1. Thermal Energy the total energy of particles that make up a substance, a form of energy felt as

2. Temperature the average amount of energy of the motion in the molecules of a substance.

3. Heat Transfer the transfer of thermal energy between substances due to a difference in their temperatures.

4. Energy transfers from warmer _______ matter cooler to _______ matter until both reach thetemperature same ________.

5. Radiation the direct transfer of energy through empty space by electromagnetic waves.

Examples: A camp fire Microwave oven Light bulb Sun

6. Conduction the direct transfer of heat from one substance to another that is

7. The better the conductor, the faster more ______ the heat will transfer.

Good Conductors Copper Silver Iron Steel Poor Conductors Wood Styrofoam Air Paper Conductor- allows heat to pass through. Insulator- does not allow heat to flow through.

8. Convection the transfer of heat by movement of currents within a fluid. (gas or

gas 9. As a ______ or liquid _______ is heated, it warms, expands, and rises because it is less dense _______. When the denserit gas or liquid cools, becomes ________ current andconvection falls, it creates a ____________.

Examples: �Warmer water at the surface of a lake or swimming pool. �Wind currents �Hot air balloon �Lower floors of a building being cooler than the top floor. �Boiling water