Visualizing Sound Waves

Sound Waves Seen

Today you will be viewing various demonstrations that allow you to better understand how sound works.

Can sound waves move other objects?

Multiple Choice

What causes the sounds that you hear when the man strikes the pot?

• The vibration of the pot

• The vibration of the spoon

• The vibration of the rice

• The vibration of the man

Multiple Choice

What causes the rice to move?

• The vibration of the pot

• The vibration of the spoon

• The vibration of the air

• The vibration of the bowl

Multiple Choice

Because the vibrations move through the pot, the air, and the rice they are all considered _________________ for the wave.

• Small

• Medium

• Large

Activity 2: Open up and Say Ahh

Activity

1. put your hand on your throat (under your chin) and swallow (you'll feel your larynx move up and down)

2. say 'ah' (you'll feel the larynx vibrate when you make the sound)

Multiple Choice

The human larynx (voicebox) creates _____________ as air travels through it. This is the source of the sounds we produce.

• Waves

• Vibrations

• Energy

• Waves

Multiple Choice

True or False? The reason that people's voices don't sound the same is based upon how hard they breathe

• True

• False

Dropdown

People's voices get deeper when they age because their vocal cords get ​

Select answer

Activity 3 Tuning fork in water

Multiple Choice

As you watch the tuning fork vibrate back and forth each vibration would create 1 compression as it presses the air particles it travels through. The distance from one compression to the next compression is the _______________________

• Amplitude

• Frequency

• Wavelength

• Medium

Multiple Choice

Different tuning forks will vibrate more or less often than each other and produce different pitches. How many waves a tuning fork makes each second is measured in Hertz and is the waves _________________________

• Amplitude

• Frequency

• Wavelength

• Medium

Drag and Drop

If you strike a tuning fork harder, you give it more energy. This increase in the energy of the wave is its ​

Placeholder

and would be seen as a more compressed area of compression​

Drag these tiles and drop them in the correct blank above

amplitude

wavelength

frequency

compression

rarefaction

Activity #4 Rubber Band Instruments

Multiple Choice

One of the differences between the instruments is that the different size chambers the sound can vibrate in or resonate. The larger the chamber the ____ the sound

• The Louder

• The Softer

• The Size of the chamber does not make a difference

Multiple Choice

Another factor that will impact the sound created is the tightness of the rubber band. The tighter the rubber band the more often it will vibrate or the frequency will ______

• Increase

• Decrease

• Not Change

Activity #5: Speed of Waves

Multiple Choice

Which type of wave traveled the fastest in the experiment?

• The sight of the explosion

• The sound of the explosion

• The vibrations of the explosion through the ground

Multiple Choice

Both the sound of the explosion and the vibrations of the explosion through the ground are the same type of mechanical waves. Why do they travel faster in the ground?

• The ground is lower

• The particles in the ground are closer together than the particles in the air

• The particles in the ground are farther apart than the particles in the air

Activity #6: How do the ears work

Labelling

Label the various parts of the ear

Drag labels to their correct position on the image

Outer Ear

Middle Ear

Inner Ear

Match

Match the following part of the ear with it's function

• Outer Ear

• Middle Ear

• Inner Ear

Collects Sound

Amplifies Sound

Interprets sound / Sends auditory signal

• Collects Sound

• Amplifies Sound

• Interprets sound / Sends auditory signal

Discussion Questions

Multiple Select

What can happen to sound waves when they strike objects. (Check all that apply)

• The can reflect

• They can be absorbed

• They can change pitch

• They can diffract (bend around)

Dropdown

If sound waves won't travel through empty space an astronaut outside the ship would have to use ​

Select answer

to communicate with the people on the ship.

Multiple Choice

Based on the way sound is reflected or absorbed, which room would be the loudest with the same amount of sound

• Bedroom with a lot of blankets and soft tapestries on the wall

• Bathroom with hard mirrors and tile floors

Multiple Choice

When you are having a conversation with your friends, how are the sound waves behaving?

• The sound waves bounce off each other

• The sound waves are absorbed by each other

• The sound waves pass through each other

• The sound waves cancel each other out.

6. Discuss why you see lightning before you
hear thunder during storms.

Dropdown

We see lightning before we hear thunder because light travels at ​

Select answer

and sound travels at ​

Select answer