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Bellringer

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

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Bellringer

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  1. Bellringer • Do not write the question…. • Identify the following as conduction, convection, or radiation. • Getting your hands warm by a campfire • Touching a hot pan from the oven • The sun warms the sand on a beach • Boiling water to make macaroni • Holding a cup of hot coffee in your hand • 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. Chemical Energy 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.

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