Sound Waves

Sound Waves

How does the energy from the radio reach my ears?

Review - ​Waves transfer Energy

• ​Waves transfer energy.

• ​A sound wave transfers energy from a vibrating object to our ears.

• ​Nerves carry a message from our ears to our brain, and we hear the sound.

Match

It gets transferred.

• What?

• From Where?

• To Where?

• How?

Energy

A Vibrating Object

Our Ears

By a Sound Wave

• Energy

• A Vibrating Object

• Our Ears

• By a Sound Wave

Dropdown

Sound waves carry energy from a ​

Select answer

to ​

Select answer

.

Multiple Choice

How does energy get transferred from a vibrating object to our ears?

• By sound waves

• By light waves

• By nerves

Multiple Choice

How does information get transferred from our ears to our brain?

• By sound waves

• By light waves

• By nerves

​Traveling Sound

• ​In order to travel, sound waves need a medium (or piece of matter) to travel through.

• ​This medium can be solid, liquid, or gas.

• ​Often, we hear sound that travels through air, a gas medium.

• ​In Space, there is no air, so sound cannot travel. Space is silent.

Multiple Choice

The matter that waves travel through is called a ____.

• Source

• Receptor

• Medium

Multiple Choice

Mediums can be ____.

• Solid only

• Liquid only

• Gas only

• Solid, Liquid, or Gas

Multiple Choice

Most of the time, we hear sound that has traveled through ____.

• Water

• Air

• Walls

Multiple Choice

A place with no mediums for sound to travel through is ____.

• The Ocean

• The Classroom

• Outer Space

Multiple Choice

If you scream in outer space, ____.

• You will sound louder.

• You will sound quieter.

• You will make no sound.

Multiple Choice

Why will you make no sound in space?

• There is no medium for the wave to travel through.

• Your vocal cords are cut in space.

• No one is there to listen to you.

​Review - Wave Diagrams

• We cannot see waves of energy, so we draw diagrams to help us make observations.

• ​The amplitude tells us the amount of energy in the wave.

• ​The wavelength helps us to identify the color of the wave.

Multiple Choice

Which part of the wave is shown at letter A?

• amplitude

• crest

• trough

• wavelength

Multiple Choice

Which part of the wave is shown at letter B?

• amplitude

• crest

• trough

• wavelength

Multiple Choice

What part of the wave is shown at letter C?

• amplitude

• crest

• trough

• wavelength

Multiple Choice

Which part of the wave is shown in letter D?

• amplitude

• crest

• trough

• wavelength

Labelling

Label the wave.

Drag labels to their correct position on the image

Trough

Crest

Zero Line

Amplitude

Wavelength

Match

Match the following

• No energy

• Highest Point

• Lowest Point

• Zero Line to Crest

• Crest to Crest

Zero Line

Crest

Trough

Amplitude

Wavelength

• Zero Line

• Crest

• Trough

• Amplitude

• Wavelength

Multiple Choice

The ______ can help you to identify the color of the wave.

• Amplitude

• Wavelength

• Zero Line

Multiple Choice

The _____ can help you identify the amount of energy in the wave.

• Amplitude

• Wavelength

• Zero Line

Volume of Sound

• ​Volume means how loud or quiet a sound is.

• ​The volume of a sound depends on the energy in the wave.

• ​We know amplitude shows the amount of energy.

• ​A loud sound will have a big amplitude.

• ​A quiet sound will have a small amplitude.

Multiple Choice

____ means how loud or quiet a sound is.

• Pitch

• Volume

• Medium

Multiple Choice

We can predict the volume of a wave by observing its ____.

• Frequency

• Wavelength

• Amplitude

Multiple Choice

Waves with a tall amplitude will sound ____.

• High-pitched

• Low-pitched

• Loud

• Quiet

Multiple Choice

Waves with a short amplitude will sound ____.

• High-pitched

• Low-pitched

• Loud

• Quiet

Open Ended

"I predict Wave ___ will sound louder because _____."

​Pitch of Sound

• ​Pitch means how high or low a sound is.

• ​Pitch depends on the frequency of the wave, which is how many crests we see each second.

• A high-pitched sound has many crests per second.

• ​A low-pitched sound has a few crests per second.

Multiple Choice

____ means how high or low a sound is.

• Volume

• Pitch

• Medium

Multiple Choice

We can predict the pitch of a wave by observing its ____.

• Amplitude

• Frequency

• Zero Line

Multiple Choice

Waves will sound high-pitched when we observe ____ crests per second.

• Many

• Few

• No

Multiple Choice

Waves will sound low-pitched when we observe ____ crests per second.

• Many

• Few

• No

Open Ended

"I predict Wave ____ will have a higher pitch because _____."

Dropdown

I observe that these waves have the same ​

Select answer

but different ​

Select answer

.

I infer that they have the same ​

Select answer

but different ​​

Select answer

.

Dropdown

I observe that these waves have the same ​

Select answer

but different ​

Select answer

.

I infer that they have the same ​​

Select answer

but different ​

Select answer

.

Open Ended

"I predict that Wave A will have a ____ volume but a ____ pitch because __________."