Crash Course Physics Waves

Draw

Draw something to do with "Sound"

Tuning fork and water

Sound waves

Sound: Crash Course Physics #18 (end at 5 mins)

Take notes with teacher

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Tuning fork, plastic wrap and rice

Multiple Choice

What causes sound waves to form?

• vibrating objects

• magnetic objects

• the sun

• heat energy

Multiple Choice

What is the part of a sound wave where the particles are bunched up (compressed)?

• Compression

• Rarefaction

• Tight

• Transverse

Multiple Choice

What is the part of a sound wave where the particles are spread apart?

• Compression

• Rarefaction

• Loose

• Transverse

Open Ended

Why can't sound travel through space?

Multiple Choice

Sound travels _______ through mediums which are more dense (particles closer together)

• faster

• slower

• inside

• outside

Reorder

Reorder the following from the material would which transmit sound the slowest to the fastest

• Gas

• Solid

• Liquid

1

2

3

• 1
• 2
• 3

Sound Waves

• Molecules move by pushing forward and spreading

• Needs matter to travel through

Sound Properties (Amplitude, Period, Frequency, Wavelength) | Physics | Khan Academy

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Properties of a Wave

• Amplitude

• Wavelength

• Frequency

• Period (cycle)​

Amplitude

• Height of wave from its resting point.

Wavelength

• Distance between peaks (or troughs)

Frequency

• How many waves pass a point in one second.

• Measured in Hertz (Hz)

• Period: time for 1 "cycle" of a wave​ (seconds)

• High fr​eq ("faster") = more energy!

• Low freq ("slower") = less energy!

Sound Waves

• Molecules move by pushing forward and spreading

• Needs matter to travel through

High freq = higher energy

Low freq = lower energy

​

High freq = shorter wavelength

Low freq = longer wavelength

INVERSE REALTIONSHIP​

​

Sound lab

Scootle seeing with sound​

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Multiple Choice

Which letter represents amplitude?

• A

• B

• C

• D

• E

Multiple Choice

Which letter represents a trough?

• A

• B

• C

• D

• E

Multiple Choice

The distance from one point to the next corresponding point on a wave is called the ________________.

• waveform

• peak

• amplitude

• wavelength

Multiple Choice

The highest point of a sound wave is called a _________________ .

• crest/peak

• trough

• wavelength

• amplitude

Multiple Choice

Which points represent one wavelength?

• A to F

• B to F

• E to G

• H to I

Sound properties: pitch and loudness

• Identify the relationship between frequency and pitch.

• Identify the relationship between amplitude and loudness.

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There are three important characteristics which every wave has.

• frequency

• wavelength

• amplitude

 

These characteristics determine the pitch and loudness of a noise.

Subject | Subject

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Online Tone Generator

https://onlinetonegenerator.com/

Multiple Select

State the two wave characteristics that determine the pitch of a sound (choose 2)

• Frequency

• Wavelength

• Amplitude

• Peak

Multiple Choice

State if an opera singer producing a note with a high frequency will have a high or low pitch?

• High

• Low

Multiple Choice

State whether a note played by a bassist with a low frequency will have a high or low pitch.

• High

• Low

Multiple Choice

State whether an engine producing a sound with a long wavelength will have a high or low pitch.

• High pitch

• Low pitch

Multiple Choice

State whether a bell producing a sound with a short wavelength will have a high or low pitch?

• High pitch

• Low pitch

​Loudness? (intensity)

Amplitude! How "big" the movement is from "still/equilibrium" position

​

More movement of particle = greater amplitude = greater loudness!​

Subject | Subject

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Multiple Choice

State what controls the volume of a sound wave.

• Frequency

• Wavelength

• Amplitude

• Peak

Multiple Choice

State which wave has a larger amplitude.

• A

• B

• Both the same

Multiple Choice

State which wave has a lower volume (quieter)

• A

• B

• Both the same