Science Unit 2: Sound

Pitch

How high or low a sound is

Volume

How loud or quiet a sound is

Control Variable

The variable that stays the same throughout an investigation

Independent Varibale

The variable that causes the change

Depended Variable

The variable that is measured in an experiment

Vibrations

The way a sound travels from a source

Liquid

Sound travels best through this state of matter

Muffle

to hide the sound of something (using a soft material like wool)

Sound Level Meter

A device you can measure sound with

Decibel

The unit we use to measure the volume of sound

Tightening ukulele strings

causes the pitch to become higher

Amplifier

A device we can use to make the volume louder

High Pitch

Vibrations of sound are smaller, so the vibrations move faster

Low Pitch

Vibrations of sound are bigger, so the vibrations move slower

Listening to something through tube

increases the volume of sound that reaches a person's ear