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5th grade sound energy

Mechanical waves

forms when a disturbance causes energy to be transferred through matter such as air or water

Vibration

a rapid back-and-forth movement of an object

Pitch

how high or low you perceive the sound to be

Volume

how loud or soft a sound is

A sound with ________ frequency has _______ pitch.

low frequency has low pitch

A sound with high _________ has _________ pitch.

high frequency high pitch

The number of vibrations per second of the sound.

frequency

How high or low you perceive a sound to be

pitch

A form of energy that is produced by vibrations of an object.

sound

The loudness of a sound.

volume

Describe three ways instruments produce sound?

A reed vibrates when you blow into it, hit a drum, plucks strings

How do sound waves travel

They move in all directions from an object that makes a sound.

How do they measure sound?

In decibels (dB)

How does a bat fly at night?

The bats can produce sound that hits objects and bounces back in the form of a echo. The echo's help give information about the surroundings.

How does a woodwind instrument create sound?

Through a thin piece of wood called a reed.

How does sound travel?

In the form of compressed waves

Sound is a form of energy that travels through ___________?

Air

Sound travels faster in a __________ and a _____________ than it does in a gas.

solid and liquid

The speed of the sounds depends on what?

The type of medium which it's moving through.

What absorbs more sound a soft object or a hard object?

A soft object.

What happens when sound waves hit something?

Some of the energy is absorbed, some is reflected

What has higher frequency a tuba or a trumpet?

A trumpet

What is the difference between sound waves and light waves?

Sound waves travel in compressions in matter, but light does not compress matter.

Amplitude

in sound, this determines how loud the sound is

Compression

the areas where the particles of a longitudinal wave are compressed "bunch up"

Decibel

the units we use to measure how loud the sound is

Frequency

the number of waves in a certain period of time

Hertz

the units we use to measure frequency

Transverse wave

particles move perpendicular to the direction of the wave

Mechanical wave

waves that have to have a medium - they can't travel through empty space

Medium

any matter that waves travel through

Pitch

how high or low the sound is

Rarefaction

the areas where the particles of a longitudinal wave are sparse

Reflection

the bouncing back of a sound wave after it hit a surface

Sound energy

energy that comes from vibrating particles

Vibration

small, rapid (quick) back and forth movement

Wave

disturbance that carries energy through matter or through empty space

Wave speed

how fast the wave travels

Wavelength

the space from the middle of one compression to the middle of the compression next door to it

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