How We Hear Sound. Lesson 9

How We Hear Sound
Lesson 9
Before You Read
Look at the pictures.
Who can’t hear sound? Why?
The man in picture ⓓ can’t hear sound because there is no air in space. Air is a medium that carries sound.

How We Hear Sound
Lesson 9
Before You Read
Look at the pictures.
Who can’t hear sound? Why?
The man in picture ⓓ can’t hear sound because there is no air in space. Air is a medium that carries sound.

Key Words

attach

vibrate

shake
잘려진 음원 없음

firm

medium

empty

firm

attach

medium

vibrate

empty

shake

to connect something to something else
attach
?

to move with very short, rapid motions
vibrate
?

to quickly move something back and forth
shake
?

hard or solid
firm
?

a substance through which something moves
medium
?

not containing anything
empty
?