Clickers Review for Energy Transformations and Heat Transfer TEST

1. Clickers Review for Energy Transformations and Heat Transfer TEST

2. Please select a Team. • Team 1 • Team 2

3. 60 What causes warm air to rise and cold air to sink? • A difference in density • A difference in climate • A difference in weather • A difference in substance

4. 60 Sally is roasting a marshmallow over a campfire on the end of a piece of wire. She knows that the energy from the fire causes the molecules in the end of the wire that are closest to the fire to move faster. These molecules transfer some of their extra kinetic energy to other molecules close by, and these, in turn, affect still more molecules. Sally knows that this method of energy transfer is • convection • condensation • radiation • conduction

5. 60 What sort of energy is found in the spring of a set mousetrap? • Kinetic energy • Potential energy • Nuclear energy • Chemical energy

6. 60 In the EduSmart lesson Maya rubbed her hands together when she was cold. How could this energy transformation be written? • Nuclear  Chemical • Physical  Thermal • Mechanical  Thermal • Electrical  Chemical

7. 60 Jacob is standing with his back facing a campfire. He notices that his backis much warmer than his chest. He knows that heat energy is being transferred from the fire and that this method of energy transfer can happen even if no air is present. This method of energy transfer is — • convection • condensation • conduction • radiation

8. 60 Which of the following is an example of nuclear energy? • A magnet picking up a paperclip • The sun shining • Burning coal • Steam turning a turbine

9. 60 During energy transformations some energy is always transformed into …? • Thermal energy • Sound energy • Mechanical energy • Nuclear energy

10. 60 A weight hanging from the ceiling is an example of which state of energy? • Potential energy • Gravity energy • Nuclear energy • Kinetic energy

11. 60 Which of the following is an example of kinetic energy being converted to potential energy? • On a factory assembly line, boxes slide down a ramp. • The cord of a bow-and-arrow is released, propelling the arrow forward. • At an ice rink, an ice skater gives another ice skater a gentle push. • A bike rider stops pedaling and lets his bicycle coast up a hill.

12. 60 A hot saucepan is placed on a cold bench. Heat will flow from the saucepan to the bench until • The bench is warmer than the saucepan • The bench is as hot as the saucepan • The saucepan has lost all heat • The saucepan and the bench are the same temperature

13. 60 Photosynthesis is the process by which green plants use solar energy to convert simple substances into complex ones that contain _____ energy. • nuclear • geothermal • chemical • heat

14. 60 Scientists have designed solar cells to trap solar energy and convert it to _____ energy. • hydroelectric • wind • electrical • chemical

15. 60 Jason ate a granola bar and then went for a run. He ran one mile and sweat heavily. Jason's body transformed chemical energy from the granola bar into... • electrical and sound energy. • mechanical and light energy. • mechanical and heat energy. • electrical and heat energy.

16. 60 A softball is dropped off of the side of a building. Ignore the effects of air resistance. As the ball continues to fall freely, the kinetic energy of the ball • remains the same. • equals zero. • decreases. • increases.

17. 60 The Cub Scouts are having their annual Pinewood Derby Race. The unpowered soap box racers are lined up at the top of a hill and ready to begin. What gives the cars their potential energy? • their wheels • gravity • their speed • friction

18. 60 Study the diagram of the rollercoaster. Position A is the starting point for the rollercoaster. At which position will the first rollercoaster car have the most kinetic energy? • A • B • C • D

19. 60 The wax of a burning candle is a fuel that combines with oxygen in the air. As the fuel is consumed, what happens to most of the energy stored in the bonds of the wax? • It is released as potential energy. • It stays in the wax. • It is released as heat and light. • It is destroyed along with the wax.

20. 60 Which statement is true about energy changes? • Energy can be destroyed but not created. • Energy cannot be created or destroyed. • Energy can be created but not destroyed. • Energy can be created and destroyed.

21. Bobby is drinking a cup of hot chocolate as he sits by a campfire on a chilly evening. He knows that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over his cup of hot chocolate expands and rises and is replaced by cooler, denser, air. This method of energy transfer is- • Convection • Condensation • Conduction • Radiation 60 Countdown

22. An ice cube is placed onto a hot pan that is sitting on the countertop. How will the heat energy move? • The coldness will move from the pan to the ice cube. • The coldness will move from the ice cube to the pan • The heat will travel from the pan to the ice cube • The heat will move from the ice cube to the pan 60 Countdown

23. Team Scores