Chp. 9 Sound: Uses of Sound

A sound wave uses up its energy as it moves away from its source, causing the sound to gradually fade.

• True

• False

Tags

NGSS.MS-PS4-1

A harsh, unwanted, or unexpected sound is often called a ___________.

A sound wave that bounces back toward its source and is heard again is called an/a ___________.

Tags

NGSS.MS-PS4-2

The ability that some animals have to "see" with sound is called ______________.

• sonar

• ultrasound

• echolocation

• acoustics

Tags

NGSS.MS-PS4-2

The science of sound is known as _______________.

Tags

NGSS.MS-PS4-2

A type of echolocation developed by man during WWII to help locate German U-Boats underwater.

Tags

NGSS.MS-PS4-2

Doctors can use an/a ________________to see inside a person's body without doing any surgery by using high-frequency sound waves.

• sonar

• acoustics

• ultrasound

• echo

Tags

NGSS.MS-PS4-2

Both singing and speaking are results of vibrations of the vocal cords in the ___________, or voice box.

Sounds reflect more clearly from _________________.

• smooth, hard surfaces

• rough, soft surfaces

Tags

NGSS.MS-PS4-2

Rough, soft, or fuzzy materials will ____________sound waves.

• reflect

• absorb

• echo

Tags

NGSS.MS-PS4-2