Waves and Sound Review

How many seconds will it take to hear an echo if you yell toward a mountain 210 m away on a day when the temperature is 8C?

• 0.1
• 0.625
• 1.25
• 2

Sound travels FASTEST through which of these materials?

• Air
• Empty space
• Metal
• Water

What is frequency?

• the number of vibrations per second
• how high or low a sound is
• the loudness or softness of a sound
• the back and forth movement of matter

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Resonance occurs when 

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

The Tacoma Narrows Bridge collapsed due to 

• resonance
• frequency modulation
• beats
• destructive interference

A wave that has a wavelength of 5 meters and a frequency of 60 Hz., what is the speed of the wave?

• 5m/s
• 300m/s
• 30m/s
• 60m/s

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The time needed for a wave to make one complete cycle is its 

• frequency
• velocity
• amplitude
• period

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When two or more waves are at the same place at the same time, the resulting effect is called 

• a standing wave
• a doppler wave
• a shock wave
• interference 

The Doppler effect is the change in observed frequency due to 

• the original frequency of the source
• the type of medium the is in
• the motion of the source or observer
• the type of wave

Which type of wave is pictured? 

• Earthquake 
• Longitudinal 
• Transverse 
• Tsunami 

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