Sound Waves
Sound is made when things _____________.
vibrate
When sound travels down the ear canal it causes this to vibrate first.
Ear drum
When sound waves reach the eardrum, what happens next?
The auditory nerve detects the vibration and sends them to the brain.
If you have a skinny elastic and a fat elastic, which one will make the higher pitch?
Skinny elastic
Energy that is generated when matter vibrates then travels in waves...
Sound
The highness of lowness of sound is called its______.
Pitch
The part of the ear that funnels the sound.
The outer ear
A pair of elastic fibered bands that vibrate to produce sounds in the human body is called the _________.
Vocal chords
Miss Nicoara made a guitar with two elastic string and a box. She wants to make the sound louder. What should she do?
a. use one elastic
b. use a larger box
c. pluck the elastics harder
d. pluck the elastics more gently
Pluck the elastics harder
When a sound wave bounces or is reflected from a surface...
Echo
Sound can travel through...
States of matter: solid, liquid or gas
What are the three parts of the ear?
outer, middle and inner ear
What is the best conductor of sound?
Solid
If you take a ruler and hang 20 cm off the edge of the desk and pull down would it cause a high or low pitch sound?
low pitch
What is pitch?
How high or low a produced sound is.
If a sound wave is TALL and CLOSE TOGETHER it is...
Loud and high pitch
What nerve carries a message about the sound to the brain?
auditory nerve
What is the worst conductor of sound?
Air
What happens if you add more tension/pressure on a stringed instrument?
The pitch changes on a stringed instrument from high to low or low to high.
What are vibrations?
Invisible waves that move rapidly up and down.
If a sound wave is SHORT and VERY SPREAD APART it is...
Quiet and low pitch
What is the spiral shaped part of your ear called?
Cochlea
What is located in the cochlea?
liquid and tiny hairs
Auditory means ______.
What happens when you continue to strum a harp faster?
The speed makes the pitch increase (go higher)