The distance from the middle of one compression to the middle of the next

Wavelength

The sound of a large bell is (lower/higher) than the sound of

a small bell

LOWER

• Bigger bell vibrates slower = lower pitch

place where the air molecules are pressed

together

compression

Percussion instruments played by ______________

HITTING

between the compressions, the

molecules spread apart

Rarefaction/expansion

To move rapidly back and forth

vibrate

The pitch will be lower if the tension of the string

(increases/decreases)

DECREASE

• If the string is looser(decrease in tension), it will vibrate slower = lower pitch

how high or low sound,

pitch

A wave that carries sound energy

Longitudinal Wave

A material through which a wave travels

medium

Long strings have (higher/lower) pitch than short ones

LOWER

• Longer strings vibrate slower = lower pitch

Unit of measure for loudness of sound

DECIBELS

The distance that a vibrating object moves as

it vibrates

amplitude

the number of vibrations(sound waves)

per second

Wave Frequency

form of energy produced by a vibrating object

sound

low pitch means _______frequency

low

the height of the sound wave

amplitude

Sound energy travels (inward or outward) from a

vibrating object

outward

Sound travels faster through ________ (solid, liquid, or gas)

solid

Height or distance of a sound wave

amplitude

Opposite of compression

rarefaction

A measurement of the loudness of sound

DECIBEL

The higher the amplitude, the ________ the sound

louder

sound waves are ________ waves

longitudinal

How high or low a sound is

pitch

The more energy you put into an instrument, the _________ the

sound

louder

Low frequency, ________ pitch

low

Sound is made when something ___________

vibrates

How many wavelengths?

3

Which diagram has a higher pitch?

The diagram on the left – if has a higher frequency (more wavelengths per second)

Which if louder?

The diagram on the right has a higher amplitude which means it

has a louder sound.

Write what type of wave – blue and red waves

Label the parts of the waves

Wavelength

Crest