How Sound Travels pg 54
Sound moves in?
waves.
What are the three main parts of the ear?
Your voice begins in your?
larynx
Tiny particles of light are called?
photons
What shape are you eyeballs?
almost round
Sounds are made by ____________ objects.
vibrating
Sound waves move down the?
auditory canal
Small bands of tissue are called?
vocal cords
Light waves travel through?
empty space
The pupil is a?
hole
The lowest part of a wave is called?
the trough.
The thin membrane across the auditory canal is called the?
eardrum
Everyone's voice has it's own?
pitch and sound
When light rays bounce back it's called?
reflection
Light rays hit what at the back of your eye?
retina
1/2 the distance between the crest and the trough is the?
amplitude
The three small bones are located where?
What do you use to shape sounds into words?
mouth, tongue, teeth, and lips
When a light ray goes through a different substance its called?
refraction
Your brain receives messages from?
the optic nerve
The distance between the crests of two of its waves is the?
wavelength
The inner ear is filled with?
liquid
A person's pitch depends on the size of their?
voice box
Sound travels how fast?
one fifth of a mile in a second
What changes size to let in the right amount of light?
iris