1 / 21

# Heat Transfer

Heat Transfer. Heat transfer. Everything is made of molecules. When molecules gain energy they move faster and create more heat. (The faster the molecules move the hotter they are). Evaporation. Melting. Freezing. Condensation. Solid. liquid. Gas.

Télécharger la présentation

## Heat Transfer

E N D

### Presentation Transcript

1. Heat Transfer

2. Heat transfer • Everything is made of molecules. • When molecules gain energy they move faster and create more heat. • (The faster the molecules move the hotter they are) Evaporation Melting Freezing Condensation Solid liquid Gas Molecules move very slowly! They are close together. Molecules move faster and are more spread apart. Molecules move very fast! They are very spread apart.

3. Heat • Is the transfer of thermal energy from a hotter object to a cooler one until both objects are the same temperature. (You can not transfer cold or give someone cold) heat transfer video clip

4. 3 ways that heat is transferred within the atmosphere Radiation Conduction Convection

5. The first method of heat transfer How does heat energy get from the Sun to the Earth? RADIATION ?

6. Radiation What creates electromagnetic waves? Video clip 1 video clip 2 Eureka start at 2:30 • The direct transfer of energy by infrared electromagnetic Waves. • Sun, fire, light bulbs

7. Pair Share • Partner A: What is radiation and where does it come from. • Partner B: What are three different things that create electromagnetic radiation?

8. Conduction • conduction video clip 1 • Eureka • The direct transfer of heat from one substance to another substance that is touching. Objects have to touch!!! Ironing Clothes Stepping on hot sand. That’s Hot

9. Conduction When you heat a metal strip at one end, the heat travels to the other end. As you heat the metal, the particles vibrate, these vibrations make the adjacent particles vibrate, and so on and so on, the vibrations are passed along the metal and so is the heat. We call this?

10. Example of Conduction

11. Pair Share: Partner A: Using the picture on the right explain the conduction process Pair Share: Partner B: Explain how the picture on the left is conducting heat.

12. Convection • convection video clip • Convection 2 • Convection- Eureka • The transfer of heat by movement of a fluid (liquids and gases). Cooking peas in water Blow Drying your Hair. Dryer OVEN

13. Water movement Cools at the surface Convection current Hot water rises Cooler water sinks