Sound energy

Q1.If you press down on a piano key it makes a sound wave. Now you press the key harder, and it's louder. How did that change the sound wave?

• The sound's amplitude and energy increased.

• The sound's wavelength increased.

• The sound's frequency increased.

• The sound's energy would decrease

Tags

NGSS.MS-PS4-1

A frequency of one sound wave per second is...

• a hertz

• a decibel

• a pitch.

• an intensity.

Tags

NGSS.MS-PS4-1

An echo is created when a sound is

• absorbed.

• scattered.

• refracted

• reflected.

Tags

NGSS.MS-PS4-2

Sound waves moving in a regular pattern is...

• echoes.

• noise.

• music.

• none of the above

Tags

NGSS.MS-PS4-1

Somebody yelling is an example of ....

• mechanical

• chemical

• heat

• sound

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound does not travel through....

• wooden doors.

• outer space.

• water.

• steel rails.

Tags

NGSS.MS-PS4-2

The Doppler Effect changes the..

• loudness.

• pitch.

• intensity.

• resonance.

Tags

NGSS.HS-PS4-1

The hammer, anvil , and stirrup are in the ....

• cochlea.

• outer ear.

• middle ear

• inner ear.

Sonar is used to find......

• angle of reflection.

• speed.

• time.

• distance.

Tags

NGSS.MS-PS4-2

In what substance does speed travel the slowest?

• air

• steel

• rubber

• water

Tags

NGSS.HS-PS4-1