[LT 1] Sound needs a medium to travel through.  What is a medium?

• solid, liquid, gas

• open space

• mechanical waves

• energy

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U11.LT 1

[LT 1] Which wave in the diagram has the greatest frequency?

• 1

• 2

• 3

• 4

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U11.LT 1

[LT 1] What are the parts of a longitudinal wave?

• Compressions and rarefactions

• Crests and troughs

• Compressions and crests

• Rarefactions and troughs

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U11.LT 1

[LT 2] Velocity= ________ ; Wavelength= 0.5 m ; Frequency= 150 Hz

• .75 m/s

• 75 m/s

• 300 m/s

• 3.0 m/s

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U11.LT 2

[LT 2] Velocity= 340 m/s ; Wavelength= 10 m ; Frequency= _________

• 34 m/s

• 3400 Hz

• 3.4 Hz 

• 34 Hz

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U11.LT 2

[LT 2] Velocity= 56 m/s ; Wavelength= _________ ; Frequency= 19 Hz

• 1064 m

• 2.95 m

• 0.34 m

• 3108 m

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U11.LT 2

[LT 3] Noise cancelling headphones silence outside sounds by listening with a microphone, then playing an opposite sound wave. This is an example of...

• Constructive interference

• Destructive interference

• Standing Waves

• Cancelling Interference

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U11.LT 3

[LT 3] When a compression passes through another compression coming from the opposite direction, what occurs?

• They counteract and the wave stops.

• They combine to create a larger compression.

• They combine to create a larger rarefaction.

• All options are true.

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U11.LT 3

[LT 3] Using a resonance plate, patterns can be produced by different sound frequencies. These patterns are the result of...

• Constructive interference

• Destructive interference

• Standing Waves

• Inverse Waves

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U11.LT 3

[LT 4] Which of the following is an illustration of refraction

• 
• 
• 
• 

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U11.LT 4