1. Chapter 12
Review
Energy

2. What is a device that changes electricity or other forms of energy into mechanical energy?

3. What is the bending of light as it passes from one transparent material into another?

4. What is a back-and-forth motion?

5. What is the sudden movement of electric charges from one object to another object?

6. What is a path through which electric current can flow?

7. What is a wave that transfers sound through matter called?

8. What formed when electric current flows through wire wrapped in coils around an iron bar?

9. What is a device that produces alternating current by spinning an electric coil between the poles of a magnet?

10. What do sound waves travel through?

11. Sound travels most quickly through (a) ______________.

12. What kind of an object completely blocks light from passing through?

13. We use sound waves in a _______ device to detect objects under water.

14. What kind of circuit is shown below?

15. Which of these three metals is not attracted to a magnet?

16. What is a tool used to refract, or bend, light?

17. What is the number of wavelengths that pass a reference point in a given amount of time?

18. What kind of colored clothing makes a person feel hotter in the summer?

19. All matter is made up of tiny particles called ___________.

20. What kind of circuit is shown below?

21. What is the area of magnetic force around a magnet called?

22. Like poles on a magnet will _____________ each other.

23. Light travels more slowly through materials that are ____________.