1. Bellringer Do not write the question…. Identify the following as conduction, convection, or radiation. 1.Getting your hands warm by a campfire 2.Touching a hot pan from the oven 3.The sun warms the sand on a beach 4.Boiling water to make macaroni 5.Holding a cup of hot coffee in your hand 6.Heating air inside of a hot air balloon

2. Review __________ is the ability to cause change. –A. Work –B. Energy –C. Power –D. Velocity

3. Review __________ is the energy stored in an object due to its position. –A. light energy –B. kinetic energy –C. potential energy –D. thermal energy

4. Review __________ is a form of energy an object has if it is moving. –A. Potential Energy –B. Kinetic Energy –C. Chemical Energy –D. Thermal Energy

5. Review If the particles in an object begin to move more quickly, their average kinetic energy __________ and the object's temperature __________. –A. Increases; rises –B. Increases; drops –C. Decreases; rises –D. Decreases; drops

6. Review The transfer of energy that occurs when you touch a hot object and you are burned is called: –A. radiation –B. conduction –C. convection –D. thermal

7. Review The transfer of energy that allows you to get warm while sitting next to a fire is called: –A. radiation –B. conduction –C. convection –D. thermal

8. Review When energy changes from one form to another, the total amount of energy: –A. increases –B. decreases –C. stays the same –D. depends on the type of energy

9. Review Which of the following is NOT a form of energy? –A. Chemical –B. Thermal –C. Kinetic –D. Friction

10. Review __________ is a measure of the average kinetic energy of all the particles in an object. –A. thermal –B. temperature –C. density –D. conduction

11. Review Heat is the thermal energy that flows from a material with a _____ temperature to one with a _____ temperature. –A. high; low –B. low; high –C. low; low –D. high; high

12. Review These currents help your soup to warm evenly over a burner: –A. chemical –B. conduction –C. thermal –D. convection

13. Study Pack #7

14. Today’s Goals… I can explain how energy is involved in chemical reactions. Page 178

15. Chemical Reactions A change in matter that forms a new substance is called a chemical change –The new substance is made of the same elements as the original substance but in different combinations

16. Chemical Reactions A chemical change is a chemical reaction What are some of the chemical reactions going on around you?

17. Energy in Chemical Reactions Every chemical reaction involves a change of energy –Release energy or absorb energy –Recall the signs of a chemical change

18. Energy in Chemical Reactions If it releases energy it is called an exothermic reaction –A car engine –Burning oil, coal, gas in your home for heat

19. Energy in Chemical Reactions If it absorbs energy it is called an endothermic reaction –Baking cookies

20. What did you learn? True or False –A chemical reaction is a chemical change. –New substances can be produced in chemical reactions. –A chemical reaction that absorbs energy is called an exothermic reaction. –Baking cookies is an example of an endothermic reaction.