How communication has changed over time.

People can use both light and sound to communicate?

• Yes

• no

A megaphone makes a soft sound?

• Yes

• no

Oh no!! I can't hear. To cross the street I should use ______

• sound signal

• walk signal

Turn signals are a way that car communicates information using light.

• yes

• no

__________ is used to communicate a message in Morse Code

• paper clip

• light

• food

A computer needs ______ to communicate using its screen?

• light

• water

• food

________ uses light to help keep ships safe near land.

• lighthouse

• box

• car

Alexander Graham Bell invented _______ to help people communicate.

• telephone

• water

• lighthouse