TOPIC REVIEW

............means to share information .

• water

• communicate

• color

• food

people first used................to send messages.

• phones

• computer

• drums

• hands

what does communicate mean?

• invent

• share information

• vibrate

How were the first messages different from messages today?

• They vibrated.

• They were simpler.

• They were softer

• They were louder.

Val is listening to music.

What causes the music?

• The strings touch each other.

• The strings move back and forth very quickly.

• The long neck of the banjo rolls in circles.

Sound is ـــــــــــــــــــــــــــــــــــــ you can hear.

• energy

• matter

• air

• water

What does vibrate mean?

• move back and forth very quickly

• move back and forth very slowly

• move in a straight line very quickly

• move in a straight line very slowly

The object mustـــــــــــــــــــــــــــــــــــــ to make sound.

 

 

 

 

 

• grow

• eat

• sleep

• vibrate

Why do animals use sound?

 

 

 

• To send air

• To send message

• To send heat

• To send light

Pitch means how ـــــــــــــــــــــــــــــــــــــ or ـــــــــــــــــــــــــــــــــــــ a sound is.

• high or low

• loud or soft