Front

A disturbance that transfers energy from one place to another without transferring energy

Back

wave

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Front

A reflected sound wave

Back

echo

Tags

NGSS.MS-PS4-2

Front

What causes the echo when you and your father inspect an empty house and notice your voices and footsteps echoing?

Back

sound waves reflecting off smooth, flat surfaces throughout the house

Tags

NGSS.MS-PS4-2

Front

Material for ear protectors for loud jet engines: a material that produces sound, a material that absorbs sound, a material that transmits sound, a material that amplifies sound

Back

a material that absorbs sound

Tags

NGSS.MS-PS4-2

Front

As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's

Back

frequency.

Tags

NGSS.HS-PS4-1

Front

After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above? Options: The distance represented by C would increase, The distance represented by C would decrease, The distance represented by D would increase, The distance represented by D would decrease.

Back

The distance represented by C would increase.

Tags

NGSS.MS-PS4-1

Front

Which of the following would you hear as a low pitched sound? Options: sound wave with a frequency of 50 Hz, sound wave with frequency of 10,000 Hz, sound wave with an intensity of 10 dB, sound wave with an intensity of 100 dB

Back

sound wave with a frequency of 50 Hz

Front

When a sound is louder, what measurement gets bigger?

Back

Amplitude

Tags

NGSS.MS-PS4-1

Front

Why is the school library covered with carpet?

Back

To help absorb sounds to keep it quiet.

Tags

NGSS.MS-PS4-2

Front

The speed of sound depends on these two things:

Back

The type of medium and the temperature of the medium

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2