Sounds
The vibrations
What is Vibrations
fast back and forth wiggles
What is a signal
send message without using words
How do sound travel
by the air
What sense you can use to notice vibrations
Is a clocktower a signal? Why?
It tells time
What happens when you get closer to a sound and farther from a sound
it get louder when you are closer and quieter when you are farther
Name an instrument that vibrate that make a sound
drum, vocal cords, guitar string
Why is a firetruck siren is a signal
to know that there is a fire
can sound travel in space
no because there is no air
what happen to the sound when the vibrations stop
it stops
can animals use sound signals too?
yes, birds can chirp and dogs bark