Heat

1. Heat Transfer CH 4 Prentice Hall p.115-117

2. Heat • Heat is the energy transferred from a hotter object to a colder object. • The hotter something is, the faster its molecules are moving. • Does ice have heat?

3. Heat Transfer • Three ways heat is transferred- • Convection • Conduction • Radiation

4. Spiral Demo • Write down your observations of the spiral demonstration. What is happening and why?

5. Candle Demo • Using an arrow, predict the location of the flame where I would be able to light the match without touching the flame its self. • Top • Middle • Bottom • Observe this last demo and think about why this happened.

6. Safety • At stations 2 and 3 you must wear safety goggles. • You are working with hot objects, please keep your hands and other flammable materials away from the candle and hot plate.

7. Heat Transfer Stations • Each station is numbered (1, 2, or 3). You will begin at the station where you are currently sitting. You will have 4 minutes at each station to draw a picture, and record written observations for each example of heat transfer. • At the end of 4 minutes, you will hear the song, I Like to Move It, move to the next station. • Ex. If your at station 2, move to station 3 next, and finally to station 1

8. Remaining Time: 3 2 1 Minutes Minute

9. Remaining Time: 0 Please Move to the Next Station

10. Remaining Time: 3 2 1 Minutes Minute

11. Remaining Time: 0 Please Move to the Next Station

12. Remaining Time: 3 2 1 Minutes Minute

13. Remaining Time: 0 Please Move to the Next Station

14. Next Step Climate • Open your book to page 115. • Read about the three types of heat transfer. • Decide which station represented each type of heat transfer and copy the notes and examples.

15. Radiation Climate • The transfer of energy over long distances of space. • Moves in waves. • No direct contact • Sunlight • Open fire

16. Conduction • Heat transfer by direct contact of particles of matter. • Particles bump into each other and transfer their energy heating them up. • Putting your hand on a hot stove.

17. Convection • Heat transfer by the circular movement of a fluid (liquids and gasses). • Particles flow transferring heat energy. • Caused by differences in density.

18. How Convection Works • Density: the amount of mass in a given volume. D=M/V • Heated Fluids: • Move faster and bump into other particles. • They spread out increasing the volume. • Density decreases • Cooling Fluids • Move slower • They come together decreasing the volume. • Density increases

19. Convection Lab

20. Convection and Sea

21. The Ocean Floor

22. The Ocean Floor