The Waves and Sound Game

1. The Waves and Sound Game Lots of fun! Win valuable prizes!

2. 1. The source of all wave motion is a • region of variable high and low pressure. • movement of matter. • harmonic object. • vibration.

3. 2. The time needed for a wave to make one complete cycle is its • frequency. • period. • velocity. • amplitude. • wavelength.

4. 3. The distance between successive identical parts of a wave is called its • frequency. • period. • velocity. • wavelength. • amplitude.

5. 4. The hertz is a • unit of frequency.  • special radio wave. • type of car. • unit of period. • unit of wavelength.

6. 5. A man is standing on the shore of a beach, up to his knees in water. Every 2 seconds a wave breaks on him. What is the period of the wave? • 2 waves per second • 2 seconds • 2 hertz • 0.5 hertz

7. 6. A wave created by shaking a rope up and down is called a • transverse wave. • Doppler wave. • standing wave. • longitudinal wave. • constructive wave.

8. 7. Where can you touch a standing wave on a rope without disturbing the wave? • At a node • At any place along the wave • At an antinode

9. 8. Sound waves are • transverse waves. • longitudinal waves. • circular waves. • polarized waves.

10. 9. When two or more waves are at the same place at the same time, the resulting effect is called • a Doppler wave. • a shock wave. • a period. • interference.

11. 10. Water waves • transport water but not energy. • transport energy but not water. • transport energy and water. • are not mechanical waves.

12. 11. A singer can shatter a wine glass with his voice through • resonance. • frequency modulation. • destructive interference. • beats.

13. 12. When a sound source moves towards you, what happens to the wave speed? • It stays the same. • It decreases. • It increases.

14. 13. Brianna is standing still and listening to a siren sounding an alarm. She begins running toward the sound. The frequency of the sound she hears will • increase. • remain the same. • decrease.

15. 14. A sound wave that has a higher frequency has a wavelength that is • longer. • shorter.

16. 15. The frequency of the second hand on a clock is • 60 hertz. • 1/60 hertz. • 1 hertz.

17. 16. Compared to the speed of light, sound travels • at about the same speed. • faster. • slower.

18. 17. Sound waves in air are a series of • high- and low-pressure regions. • periodic disturbances. • periodic compressions and rarefactions. • all of the above • none of the above

19. 18. Sound waves • can travel in a vacuum. • require a medium. • are not mechanical waves. • are unrelated to vibrations.

20. 19. The frequency of a sound wave determines • how fast the sound travels. • the magnitude of the compression. • the pitch of the sound. • how loud the sound is.

21. 20. Constructive interference occurs when • two waves of the same color overlap. • the crests of two waves overlap. • the crest of one wave meets the trough of another wave. • all of the above • none of the above

22. 21. The intensity of a sound depends on • the medium. • the amplitude of the waves. • the wavelength of the sound. • the pitch of the sound.

23. 22. The speed of a sound wave is determined by the • source of the wave. • medium of the wave. • frequency of the wave. • amplitude of the wave.

24. 23. Which of the following would be most likely to transmit sound with the highest speed? • Water in the ocean • Steel in a bridge • Water in a swimming pool • Air in your classroom

25. 24. Resonance occurs when • sound changes speed in going from one medium to another. • an object is forced to vibrate at its natural frequency. • sound makes multiple reflections. • the amplitude of a wave is amplified. • all of the above

26. 25. Noise-canceling earphones are an example of • beats. • resonance. • destructive interference. • constructive interference.

27. 26. What is the period of a sound wave that has a frequency of 80 Hz?

28. 27. What is the speed of a wave that is 0.5 m long and a frequency of 658 Hz?

29. 28. A sound wave has a wavelength of 8 m. If its speed is 340 m/s, what is its frequency?

30. Short answer 29. Explain the difference between mechanical waves and electromagnetic waves and give an example of each. (about 4 sentences)

31. Short answer A mechanical wave is a disturbance in matter and cannot travel through a vacuum. Sound, water waves and a vibrating guitar string are all examples of mechanical waves. An electromagnetic wave is made of vibrating electric and magnetic fields and can travel through a vacuum. Light, radio waves and microwaves are all examples of electromagnetic waves.