sound grade 1

the example of sound source is ....

• 
• 
• 

sounds are produced when an object ____________

• moves

• sleeps

• vibrates

a sound is also used to

• warn people about danger

• sleep

• walk

_______ is how high or low we listen/perceive  a sound. 

• Pitch
• Frequency
• Amplitude
• I don't know

to ________________ means to move back and forth quickly.

• walk

• vibrate

• hang

whispering is a loud sound?

• true

• false

whistle has a high pitch.

• true

• false