wave basics
What type of wave is a sound wave - transverse or longitudinal
transverse
What property of a wave determines loudness?
amplitude
What property of a wave determines pitch?
frequency
What happens when sound bounces off a surface?
reflection (echo)
What instrument uses vibrating strings to make sound?
guitar
harp
violin
etc..
What do sound waves need in order to travel?
a medium
A wave with a higher amplitude will sound _____.
louder
A higher frequency means a _____ pitch.
higher
What happens to sound speed in solids compared to air?
It travels faster in solids
Why do we cover our ears when something is loud?
o reduce the amplitude reaching our ears.
What is the name for the regions of high pressure in a sound wave?
compressions
If you double the amplitude, what happens to loudness?
it increases (gets louder)
Which wave has a higher pitch: one with 5 waves per second or 10 waves per second?
10 waves per second
What word describes sound passing through objects?
transmission
Why does your voice sound different underwater?
Sound travels faster in water, changing how it reaches your ears.
In a sound wave, what is the distance from one compression to the next called?
wavelength
Explain why a sound gets quieter the farther you are from its source.
Amplitude decreases as sound energy spreads out. (loses kinetic energy)
How are frequency and wavelength related?
Higher frequency = shorter wavelength.
Why does sound travel slower in cold air than warm air?
Particles move slower in cold air, transmitting vibrations slower
What caused the rice on the drum to move in the car-speaker video?
Sound vibrations from the speaker
Describe how particles move in a transverse wave.
Particles vibrate perpendicular to the direction the wave travels (up and down)
A graph shows two waves: Wave A has a tall amplitude, Wave B has a short amplitude. Which is louder and why?
Wave A, because loudness is determined by amplitude
Describe how a tuning fork can demonstrate pitch differences. (shorter fork vs longer fork)
Shorter forks vibrate faster → higher frequency → higher pitch
What type of material does sound travel fastest through: gas, liquid, or solid?
solid
explain why louder sounds make the rice move more
Greater vibration → more energy → larger particle movement.