Waves Quiz 4

This is what you get when sound waves are reflected, or bounce back, off of a hard surface.

• Amplitude
• Pitch
• Volume
• Echo

Why is sound able to travel faster through a solid than a gas?

• Gas molecules are packed tightly.
• Sound does not travel faster through a solid than a gas.
• Solid molecules are packed tightly.
• Gas molecules move slowly.

which is a tool that is used in medicine to view internal organs and pregnancy.

• radar
• doppler
• ultrasound
• sonar

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When a car moves towards you, the sound of its horn seems relatively...

• Low pitched
• High pitched
• Normal

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NGSS.HS-PS4-1

When the car moves away from you, its horn seems...

• Low pitched
• High pitched
• Normal

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What do bats and dolphins use to find things? 

• their eyes
• their ears
• echolocation

What best describes the doppler effect?

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
• When sound changes pitch
• When light changes color
• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

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When two waves are aligned and come together to create a wave with a larger amplitude that is called:

• Resonance
• Constructive Interference
• Doppler Effect
• Destructive Interference

When a guitar is tuned to adjust its pitch, what is it that is changed?

• The wavelength of the fundamental.
• The frequency of the fundamental.
• The amplitude of the fundamental.

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NGSS.HS-PS4-1

How many nodes and antinodes are shown in the picture?

• 4 nodes, 3 antinodes
• 4 nodes, 6 antinodes
• 6 nodes, 4 antinodes
• 3 nodes, 4 antinodes

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NGSS.HS-PS4-1

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