WHAT IS SOUND?
Sound is a type of this.
➡️ Energy
What type of motion creates vibrations?
Back-and-forth motion
What form does sound take as it moves through a medium?
Waves
Name the three states of matter that can carry sound.
Solids, liquids, gases
What is sound measured in?
Decibels
Sound is created when something does this.
➡️ Vibrates
How does the strength of a vibration affect loudness?
Stronger vibrations create louder sounds
Why does sound need a medium to travel?
Particles are needed to carry vibrations
Which state of matter allows sound to travel the slowest and why?
Gases; particles are farther apart
What does frequency mean?
How many times sound waves repeat
We hear sound when vibrations reach this part of the body.
Ears
How does vibration speed relate to pitch?
Faster vibrations produce higher pitch
Describe how sound travels from its source to a listener.
Vibrations move through a medium to the ear
How does particle spacing affect sound transmission?
Closer particles transfer vibrations faster
What is unwanted sound called?
noise
True or False: You can see sound with your eyes.
False
Why do smaller instruments often produce higher sounds than larger ones?
They vibrate faster
Why does sound travel faster in solids than in gases?
Particles are closer together
Why can you hear sounds through a wall but not through empty space?
Walls have particles; space does not
What are the three main parts of the ear called?
The outer ear, the middle ear, and the inner ear
Sound travels as this.
Waves
Explain how both pitch and volume are controlled by vibrations.
Speed affects pitch; strength affects loudness
Predict what would happen to sound in a vacuum and explain why.
It would not travel because there are no particles
Compare sound travel in water versus air.
Sound travels faster in water because particles are closer
What is the way that bats and dolphins "hear" called?