Science 9- Chapter 6

1. Heat

2. Heat A form of energy The motion of particles in matter Flows from warmer objects to cooler ones

3. Did you Know

4. Heat can do work

5. Steam Engines Solar Energy A Toaster Automobiles

6. What produces heat energy? Rubbing your hands together produces heat.

7. Nuclear reactions In the sun The earth’s most important heat source

8. Mechanical Energy (The energy of motion) -Rubbing your hands together -Striking a match

9. Chemical Energy Sometimes heat is released when substances react chemically with each other.

10. Electricity What other appliances can you name that change electricity into heat energy?

11. Temperature A measure of how fast an object’s particles are moving.

12. Touching an object is not the safest or most accurate way to measure its temperature.

13. Use a thermometer to measure temperature accurately.

14. Water= 0 degrees Celsius 32 degrees Fahrenheit Freezing point- The temperature at which a liquid changes to a solid.

15. Melting Point- The temperature at which a solid changes into a liquid. Same as freezing point, but used when an object is being heated.

16. Boiling point- Temperature at which a substance changes from a liquid to a gas. Water= 100 degrees Celsius 212 degrees Fahrenheit

17. Every substance has its own Freezing and boiling points

18. How does heat Travel?

19. Radiation The movement of energy through space.

20. Conduction- The movement of heat energy from one molecule to the next.

21. Convection- Flow of energy that occurs when a warm liquid or gas rises. Heat makes things rise!