Sound is a ...

• gas
• solid
• wave
• particle

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Longitudinal waves move in which direction?

• In the opposite direction of the wave's travel.
• Perpendicular to the wave's travel.
• In a circular motion around the wave's travel.
• In the same direction as the wave's travel.

Sound waves are also called what?

• Pressure waves

• Electromagnetic waves
• Transverse waves
• Surface waves

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Pitch is related to what quality of a wave?

• Frequency
• Speed
• Wavelength
• Amplitude

Intensity or Loudness of a sound is related to what wave quality?

• Amplitude
• Frequency
• Wavelength
• Phase

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NGSS.MS-PS4-1

If an object emitting a sound, like an ambulance is moving toward you is the pitch higher or lower?

• Higher
• The pitch remains the same
• The pitch is lower
• The sound is silent

What did you learn through this video? When you are done get out your note packet and answer the questions on page 10 Practice: Understanding Sound.

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