Name: ______Sect:______Date:______
Chapter 13 Review
Converting Energy
- The Sun converts nuclear energy into
electromagnetic and thermal.
- Plants convert electromagnetic energy into
chemical
- A blender converts electrical energy into
mechanical
- Wind Turbines convert mechanical energy into
electrical
- Flashlights convert chemical energy into
electrical, then to electromagnetic and thermal
- Coffee makers convert electrical energy into
thermal
- Rabbits convert chemical energy into
mechanical and thermal
- Automobiles convert chemical energy into
mechanical
______9. Potential energy is the energy
a. of velocity. b. of motion. c. of distance. d. that is stored.
______10. Kinetic energy depends on
a. only mass. b. only velocity c. height. d. mass and velocity.
______11. The sun’s energy comes from
a. chemical energy. b. nuclear energy.c. electromagnetic energy. d. thermal energy.
______12. Your body converts chemical energy to all of the following EXCEPT
a. nuclear energy. b. thermal energy.c. chemical energy. d. electrical energy.
______13. A girl throws a ball 15 m into the air. The ball has the maximum
potential energy at a height of
a. 0 m. b. 5 m. c. 10 m. d. 15 m.
______14. A pendulum set in motion eventually stops because
a. the energy is destroyed.
b. the kinetic energy and potential energy are balanced.
c. friction converts the mechanical energy to thermal energy.
d. the pendulum runs out of power.
______15. An electric blanket converts electrical energy to
a. nuclear energy. b. chemical energy. c. mechanical energy. d. thermal energy.
16. A moving object can do work so it has kinetic or mechanical energy.
17. Elastic potential energy is associated with objects that can be
stretched or compressed.
.
18. A rubber band that is flying across a room is moving because it has
kinetic energy.
19. In terms of power and energy, explain why a 60-watt light bulb is brighter
than a 25-watt light bulb.
Power is how fast work is done. A 60-watt bulb converts electrical energy to electromagnetic and thermal energy faster than a 25-watt bulb.
20. Explain how fossil fuels can contain energy that came from the sun.
Fossil fuels come mainly from ancient plants which converted the Sun’s electromagnetic energy to chemical energy. This chemical energy can then be released by burning it.