Waves of Sound

Vocab 1

100

how quiet or loud a sound is

volume

200

high or low sounds

pitch

300

something that moves back and forth

vibration

400

the length of a sound wave; it determines if the pitch is high or low

wavelength

Vocab 2

100

a wave created by molecules that vibrate back and forth when they travel through the air or a liquid; the vibrating molecules can be heard when they reach a person's or animal's ear

sound

200

the length of a sound wave; it determines if the pitch is high or low

wavelength

300

a thin material in your ear that vibrates when it hears a sound; it sends a message to your brain letting it know it hears a sound

eardrum

400

an instrument that takes in sound from a microphone and shows the sound vibration's waves

oscilloscope

Lesson 1

100

Be able to describe what happens to sound as it goes from cup to cup... Step 1: What happens to sound when a voice goes into a cup?

You speak into the cup. The vibration from your voice vibrates the cup.

200

Be able to describe what happens to sound as it goes from cup to cup... Step 2: What happens to sound when the voice goes through the cup onto the string connected to the other cup?

The vibrations travel down the string.

300

Be able to describe what happens to sound as it goes from cup to cup... 3) What happens when the sound gets to the ear cup?

The vibrations travel to the cup and then to your ear.

400

What are some things that create sound vibrations?

Examples: talking, singing, violin, tuba, a dog barking, a bird cheeping

Lesson 2

100

Sound c__ n__ be heard in outer space because there is no a__ for sound molecules to travel.

can, not, air

200

It is possible for sound to travel through w____; however, you probably will not be able to h___ it very well.

water, hear

300

We can't see sound vibrations, but one way we know that they are there is by turning up the volume in the speaker of a car. The sounds from the s______ makes the car's windshield v______.

speaker, vibrate

400

When you turn up the volume in the speaker of a car, the pressure from the sound's vibrations causes the windshield to break and c____.

crack

Lesson 3

100

Sound travels through the a__ the same way r______ travel through water.

air, ripples

200

In other words sound vibrations are w____.

waves

300

If a vibration goes back and forth slowly, it creates l___ waves in the air and the pitch will be l__.

long, low

400

If a vibration goes back and forth rapidly (fast), it creates s____ waves in the air, and the pitch will be h___.

short, high