4-PS4-3. Transferring Information with Patterns

_______ works by the bouncing of sound waves off and object and measuring the time the echoes take to return.

• echo

• reflection

• sonar

• echolocation

Are radio waves used by several current communication devices?

• Yes

• No

When you hear the reflection of your voice, you are hearing a ______.

• pitch

• echo

• sound wave

• noise

Sound energy travels in ________.

• strings

• beams

• pulses

• waves

How do sound waves travel?

• in a straight path to your ear

• back and fourth from the source

• upward from the source

• outward in all directions

A type of communication that uses short and long signals to represent letters is called _____________.

• Morse code

• echolocation

• computer programming

• binary code

When a sound is louder what measurement gets bigger?

• Frequency 
• Amplitude 
• Wavelength 
• Crest

How do computers send messages?

• as light waves through the air
• as patterns of sound waves
• as Morse codes
• as patterns of ones and zeros

A wireless internet router is a transceiver because ___________.

• it allows us to send and receive messages

• it allows us only to send messages

• it allows us only to listen to messages

• it allows us only to receive messages

A cell phone is basically a sophisticated __________.

• remote control

• gamma ray

• microwave

• radio