8th Grade Unit 4 Waves

Students are modeling waves by shaking a rope up and down. We know this is a wave because-

• the rope is made up of strands of cotton threads which are braided together.

• the rope stops moving when the students stop shaking it up and down.

• it has a repeating pattern with a specific wavelength, frequency, and amplitude.

• the student can change the distance the rope moves by moving the rope further up or down.

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NGSS.MS-PS4-1

Which of the waves is carrying the greatest amount of energy?

• 
• 
• 
• 

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NGSS.MS-PS4-1

The waves that carry the most energy are the waves that-

• move into a new medium.

• are closest together.

• have the greatest amplitude.

• move the most slowly.

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NGSS.MS-PS4-1

This table provides simplified data on the relationship between the amplitude of a wave and the energy the wave carries.

• 4

• 16

• 32

• 80

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NGSS.HS-PS3-1

NGSS.HS-PS4-5

Which of the following waves has the highest frequency?

• 
• 
• 
• 

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NGSS.MS-PS4-1

Which of the following provides an example of sound waves being reflected?

• Hearing music being played by a neighbor's stereo through a wall

• Water in a glass vibrating because of the sound of thunder

• A noise that produces an echo when it bounces off a distant wall

• The sound of a distant train getting louder as it approaches an observer

Tags

NGSS.MS-PS4-2

Music studios use "soundproof" recording rooms. The walls of these rooms are designed in such a way that the only sounds that reach the microphones inside the room are sounds from inside the room. The most important characteristic in designing the soundproof room is to create walls that-

• allow communication between people inside and outside the room.

• reflect sounds around the room to alter their properties.

• allow sounds to move easily from one place to another.

• absorb sounds and prevent them from passing through.

Tags

NGSS.MS-PS4-2

A student places a pencil in a glass of water and observes that the pencil appears to be broken. Which of these provides the best explanation for why the pencil appears broken?

• The pencil absorbs all the light rays that hit it.

• Water reflects light rays away from the pencil.

• Light rays are bent by the water in the glass.

• The surface of the water reflects light rays.

Tags

NGSS.MS-PS4-2

The illustration shows the path of a laser leaving a laser pointer. At what point is the laser being absorbed?

• A

• B

• C

• D

Tags

NGSS.MS-PS4-2

Which of the following is the best example of an object absorbing light?

• A black sweater in the sun

• A clean window in the sun

• A curved mirror in the sun

• A long shadow in the sun

Tags

NGSS.MS-PS4-2