4.PS4.3 digital devices use waves

Sonography uses ______________, or high-frequency sound waves, to produce images of the inside of the human body.

• microwaves

• polar waves

• light

• ultrasound

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Select two ways that a person communicating with his or her voice can be compared to radio communication.

• A radio transmitter is like a person’s ear because both send and receive information.

• A radio transmitter is like a person’s voice because both send information.

• A radio receiver is like a person’s brain because both convert patterns into usable information.

• A radio receiver is like a person’s voice because both take in usable information.

Tags

NGSS.MS-PS4-3

What kind of waves are used with echolocation?

• sound waves

• light waves

• polar waves

• kinetic waves

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Why do whales, bats, and dolphins use echolocation?

• to scare away predators

• to orient themselves and find food

• to attract mates

• to tell other animals where they are

An echo is heard when sound waves are ______________.

• changed in the Doppler effect

• absorbed by the material

• moving through empty space

• reflected from a surface

Tags

NGSS.MS-PS4-2

An echo is an example of a sound wave being _________.

• transmitted

• absorbed

• reflected

• surfed

Tags

NGSS.MS-PS4-2

Which best describes how computers send messages?

• as patterns of ones and zeros

• as light waves through the air

• as patterns of sound waves

• as Morse code messages

Tags

NGSS.MS-PS4-3

Why do cell phones change your voice to digit information of ones and zeros?

• sound waves can not travel through the air

• so that other people can not listen to your conversion

• to transmit the information with radio waves

• in case people do not speak clearly

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What kind of waves can travel through space?

• light waves

• radio waves

• sound waves

• potential waves

Tags

NGSS.MS-PS4-1

To increase the volume of your voice, you must _____________.

• increase its frequency

• stand closer to the person you are talking to

• decrease the frequency

• increase the amount of energy

Tags

NGSS.MS-PS4-1