1. The Transfer of Heat

2. Energy
Is the ability to make things move or change; all matter is made up of tiny particles or molecules

3. Molecules in Solids

4. Thermal Energy
Is the energy of these particles moving; we feel this as heat
Molecules are slower when cool.
Molecules move faster when warm.

5. What happens when particles or molecules are heated/cooled?
When molecules are heated they move faster and expand (spread apart); heated air or water becomes less dense (lighter) when heated
When molecules become cooler they slow down and tend to compact (get closer), become more dense (heavier)

6. Molecules in Liquids

7. Water Molecules: Evaporation & Condensation

8. Molecules Expand & Contract

9. More about Matter

10. Heat Transfer in Matter
The movement of heat; heat always flows from a warmer object to a cooler one
There are three ways heat transfer can happen:
Conduction, Convection, and Radiation

11. Conduction
Is the transfer of heat (thermal energy) between things that are touching

12. Conductors
Materials through which heat can move easily; metals like iron, copper, and steel

13. Insulators
Material that heat does not move through easily; plastic, rubber, wood, leather, glass, and ceramic
Ceramic Tiles

14. Conduction

15. Convection
Is the transfer of heat by the movement of liquids or gases

16. Convection

17. Convection

18. Radiation
Is the transfer of heat energy by electromagnetic waves

19. Radiation

20. 3 Types of Heat Transfer

21. 3 Types of Heat Transfer