modeling waves through various mediums

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

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

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

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

• Hearing music being played by a neighbors stereo through a wall

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NGSS.MS-PS4-2

A ringing bell makes noise inside a glass jar. Then the air is removed from the glass jar using a vacuum pump. When all of the air leaves the jar, the sound of the ringing bell can no longer be heard. Which of the following best explains why the students can no longer hear the bell?

• The air in the jar provides a medium for the sound to travel through.

• The difference in pressure inside and outside the glass jar is too great.

• The sound in the empty jar is reflected off the inside of the glass sides.

• Removing the air from the jar allows the bell to ring only very softly.

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NGSS.MS-PS4-1

What allows more transmission?

• thin materials or metal

• thick or nonmetal mediums

• neither of these

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NGSS.MS-PS4-2

Which of these do not need a medium to travel through?

• sound

• sunlight

• mechanical waves

• all of these

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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 sounds to move easily from one place to another

• reflect sounds around the room to alter their properties.

• absorb sounds and prevent them from passing through.

• allow communication between people inside and outside the room.

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NGSS.MS-PS4-2

A source creates a _______, not a __________.

• medium wave

• wave medium

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NGSS.MS-PS4-1

Automobile engineers create quieter cars and trucks by designing acoustic glass that–

• absorbs sounds.

• amplifies sounds.

• transmits sounds.

• reflects sounds.

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NGSS.MS-PS4-2

What does the speed of sound depend on?

• the type of wave

• the medium

• law of reflection

• transmission

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NGSS.MS-PS4-2

Geologists can learn about rock layers beneath the surface of Earth using sound waves. They use a vibration truck to send sound waves into the ground. A measuring truck has special microphones, called geophones, that pick up sounds.This method for learning about rock layers depends on what characteristic of sound waves?

• Sound waves can travel for an unlimited distance from the source that creates them.

• Sound waves are absorbed by dense solids and reflect off liquids.

• Sound waves can travel through and reflect off rock layers.

• Sound waves require energy, such as electricity to generate them.

Tags

NGSS.MS-PS4-2

A radio station transmits to a receiving antenna. The radio wave sent is a

• transverse wave.

• electromagnetic wave.

• sound wave.

• longitudinal wave.