Exam 4 PS S2

A disturbance that moves through a solid, liquid, gas, or a vacuum is defined as .

• a wave, as long as matter is not being transported
• sound, as long as matter is not present within the disturbance

• a wave, as long as matter is being transported

• energy, as long as matter is being transported

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NGSS.MS-PS4-1

Study the two images. What types of waves are pictured?

• A and B are both types of transverse wave

• A is a longitudinal wave and B is a transverse wave

• A is a transverse wave and B is a longitudinal wave

• A and B are both types of longitudinal wave

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NGSS.MS-PS4-1

Which of these choices most accurately describes how particles move in a transverse wave?

• The particles in the medium move perpendicular to the direction of the wave.

• Particles in the medium move perpendicular and parallel to the direction of the wave.

• The particles in the medium move parallel to the direction of the wave.

• Particles in the medium move in a circular direction around the wave.

Study the image. Which part of the wave are the arrows pointing to?

• trough

• node

• crest

• amplitude

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NGSS.MS-PS4-1

Study the image of two waves travelling at the same speed through the same medium. Which of the following choices most accurately compares the amplitudes and wavelengths of the two waves?

• The red wave has a greater wavelength because its height is greater than the height of the blue wave. Both waves have the same amplitude because the distance between crests is the same. They have different frequencies because the wavelength of each wave is different.

• The red wave has a greater amplitude because its height is greater than the height of the blue wave. Both waves have the same wavelength because the distance between crests is the same. They have different frequencies because the amplitude of each wave is different.

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NGSS.MS-PS4-1

Which of the following choices most accurately compares the amplitudes and wavelengths of the two waves?

• The red wave has a greater amplitude than the blue wave.

• Both waves have different wavelengths.

• The frequency of both waves is the same.

• The speed of the red wave is greater than the blue wave.

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NGSS.MS-PS4-1

Study the image. Which type of behavior is depicted in the image?

• reflection

• refraction

• standing wave

• reverberations

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which of these describes a wave being reflected?

• The wave encounters some obstacle or change in medium. The wave bounces off the surface and moves in a different direction, but at an angle equal to the one at which it hit the surface.

• The wave encounters some corner or a small opening. The wave bends and fans out, forming an arc.

• The wave encounters some change in medium. The wave moves through the new medium in a different direction, but at an equal angle at which it hit the surface.

• Two waves move towards each other and the crest of each wave overlaps, creating a new wave that has a greater amplitude than either individual wave.

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NGSS.MS-PS4-2

Study the image of a wave moving from air to liquid. Which of the following choices most accurately describes the behavior of the waves when they encounter the liquid?

• The speed of the wave decreases when it enters the liquid. The wavelength and frequency remain the same. The wave also changes direction.

• The speed of the wave decreases when it enters the liquid, and the wavelength decreases as a result. The wave also changes direction.

• The speed of the wave remains the same when it enters the liquid. The wavelength increases and frequency of the wave decreases. The wave also changes direction.

• The speed of the wave remains the same when it enters the liquid. The wavelength decreases and frequency of the wave increases. The wave also changes direction.

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NGSS.MS-PS4-2

A sound wave is moving with a frequency of 700 Hz. What is the period of this sound wave?

• 1/700 Hz

• 70 s

• 700 s

• 1/700 s

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NGSS.HS-PS4-1