Presentation is loading. Please wait.

Presentation is loading. Please wait.

TOPIC: Heat AIM: How is heat transferred?. What is heat transfer? Movement of heat from warm  cool object Example = hot pan Heat moves from pan  handle.

Similar presentations


Presentation on theme: "TOPIC: Heat AIM: How is heat transferred?. What is heat transfer? Movement of heat from warm  cool object Example = hot pan Heat moves from pan  handle."— Presentation transcript:

1 TOPIC: Heat AIM: How is heat transferred?

2 What is heat transfer? Movement of heat from warm  cool object Example = hot pan Heat moves from pan  handle

3 3 types of heat transfer

4 1. Conduction Heat transfer in SOLIDS

5 Heat transfer by the direct contact of molecules

6 Fast moving molecules (have more heat)  Bump into slower ones  Start to move faster  collide with other slower molecules…

7 Why can the girl on the right toast marshmallows without getting burned?

8 Conductor Material that allows heat to move through it easily Metals (copper & silver are the best)

9 Example: copper pipes (Heat exchangers in hot water tanks, under floor heating systems, and car radiators)

10 TOPIC: Heat AIM: How is heat transferred? Cont’d…

11 Insulators Do not conduct heat easily Wood, paper, wax, air, house insulation, plastic

12

13 2. Convection Transfer of heat in liquids & gases Liquid heated  molecules move faster & farther apart  less dense  rise carrying heat with it

14 Example: warm air rises, cool air sinks

15 Convection currents Up & down movement of molecules due to changes in density

16

17 Convection Currents Inside the Earth

18

19

20 3. Radiation Heat transfer through space Can travel when no matter is present (vacuum) Heat energy from sun, stars, fire

21 Radiation from the Sun travels through empty space.

22

23 Radiation from the fire heats the marshmallow.

24 SOLIDS LIQUIDS & GASES THROUGH SPACE

25

26 A B C conduction radiation convection REVIEW

27 A B D convection radiation conduction REVIEW C convection

28 3FE3-42BA-95E3-E5AEEF95E08C&blnFromSearch=1&productcode=US


Download ppt "TOPIC: Heat AIM: How is heat transferred?. What is heat transfer? Movement of heat from warm  cool object Example = hot pan Heat moves from pan  handle."

Similar presentations


Ads by Google