1. (1) is converted to solar energy.
1. The diagram below shows the steps necessary to produce the energy needed to run a
hair dryer.
As it moves from location A to location D in the diagram, the energy stored in the
coal
(1) is converted to solar energy.
(2) reduces the friction in the hair dryer.
(3) is recycled.
(4) is transformed

2. The illustration below shows an example of energy changing forms.
Which changes in energy form are illustrated in the diagram?
(1) electrical  sound  light and mechanical
(2) sound  mechanical  light and electrical
(3) mechanical  light  sound and electrical
(4) light  electrical  mechanical and sound

3. energy changes in the correct order? (1) mechanical  heat  chemical
This flashlight uses three different forms of energy. Which of these shows the
energy changes in the correct order?
(1) mechanical  heat  chemical
(2) heat  chemical  light
(3) electrical  mechanical  chemical
(4) chemical  electrical  light .

4. An example of kinetic energy continuously being changed to potential energy and back again might be –
(1) a girl swinging on a swing.
(2) a train moving down a track.
(3) electric charges moving in a straight path.
(4) a plate sitting on the edge of a table.

5. When energy is transformed from one form to another, the amount of energy
(1) increases.
(2) decreases.
(3) doubles.
(4) does not change.

6. A television set changes electrical energy to sound and light energy
A television set changes electrical energy to sound and light energy. In this process, some energy is
(1) created.
(2) destroyed.
(3) changed to matter.
(4) changed to heat.

7. Which is the best activity to help keep a home cool in the summer?
(1) Open the refrigerator often.
(2) Turn off the television, radios and computers.
(3) Open the windows during the day.
(4) Close the shades where the sun is shining.

8. What information should be placed above the arrow in the diagram below?
(1) condensation
(2) evaporation
(3) heating
(4) melting

9. Examine the diagram of the ball and ring
Examine the diagram of the ball and ring. Which of the following statements best describes what is happening.
(1) The ring expanded.
(2) The ball expanded.
(3) The ring contracted.
(4) The ball contracted.

10. Heat energy is released during
(1) freezing
(2) melting
(3) boiling
(4) evaporation

11. Heat energy is absorbed when
(1) a gas changes to a liquid
(2) a gas changes to a solid
(3) a liquid changes to a gas
(4) a liquid changes to a solid

12. Between points 4 and 5, energy is being used to change water from a
  (1) solid to a liquid
(2) solid to a gas
(3) liquid to a gas
(4) liquid to a solid

13. When a substance changes phase, there is a change in heat energy but no
(1) heat change
(2) temperature change
(3) physical change
(4) none of these

14. The temperature at which a substance changes from the solid phase to the liquid
(1) boiling point
(2) freezing point
(3) melting point
(4) none of these

15. When heat is added to a substance, its particles:
(1) contract.
(2) take up more space.
(3) lose energy.
(4) lose calories.

16. What is the source of most of Earth’s energy?
(1) the Sun
(2) fossil fuels
(3) the Moon
(4) wind and water