1. 1. Two waves with the same wavelength overlap and interfere constructively. How is the resulting wave different from the original two waves? a.It has a greater amplitude. b.It has a lower amplitude. c.It has a longer wavelength. d.It has a shorter wavelength.

2. 2. What behavior of light waves enables you to see a sharp, clear image of yourself on a water surface? a.Refraction b.Diffraction c.Reflection d.Interference

3. 3. Which is NOT related to the amplitude of a sound wave? A.Energy carried by a sound wave B.Loudness of a sound C.Pitch of a sound D.How spread out the particles are in the compression and rarefactions

4. 4. How can the pitch of the sound made by a guitar string be lowered? A.By making the vibrating part of the string shorter B.By tightening the string C.By making the vibrating part of the string longer D.By plucking the string harder

5. 5. Why can’t a sound wave move through empty space? a. Its waves are not strong enough. b. Its waves move like springs, not ropes. c. Its waves move by vibrating particles. d. It does not have the necessary range of frequencies.

6. 6. When you change the loudness in a sound, what changes in the sound wave? a.Rarefaction b.Frequency c.Wavelength d.Amplitude

7. 7. The process by which heat is transferred in a vacuum is called a.Temperature b.Convection c.Conduction d.Radiation

8. 8. The straw in a glass of water appears to bend because a.The water is not filled to the top of the glass. b.The light rays move through the air and water at different speeds. c.The glass absorbs most of the light. d.The temperature of the water and the air are not the same.

9. 9. Amplification means a.Increasing the intensity of sound. b.Increasing the pitch of sound. c.Improving the timbre of sound d.Increasing the wave power of sound.

10. 10. Which material would not let light waves through? a.Transparent b.Transmissive c.Translucent d.Opaque