P5 Sound Flashcards
(26 cards)
What is an oscillation
A repeated backwards or forwards motion ( or a repeated increase or decrease )
What is a medium
The material which a wave can pass through ( can be a vacuum )
Give four examples of a medium
Air, glass water, a vacuum
What is a wave
An oscillation that carries energy
What does a wave transfer from one place to another
Energy
What does a wave not transfer from one place to another
Particles/ matter/ stuff
What are the names of the two types of waves
Transverse and longitudinal
How are the direction of the oscillation and the direction of the wave related in a longitudinal wave
The oscillations move in parallel to the direction of the wave
How are the direction of the oscillation and the direction of the wave related in a transverse wave
The oscillations are at right angles to the direction of the wave ( perpendicular )
What type of wave is a water wave
Transverse
What type of wave is light
Transverse
What type of wave is sound
Longitudinal
What is it called when a wave bounces off a surface ( or any change in medium )
Reflection
What is oscillating when sound travels
The particles in the medium through which it travels
What types of medium can sound travel through
Solids, liquid, gases
Why can sound not travel in a vacuum
There are no particles to oscillate in a vacuum
What is the frequency of a wave
The number of oscillations that happen every second
What unit do we use to measure frequency
Hertz (Hz)
What is the hearing range of humans
20- 20,000 Hz
What is the relationship between the amplitude of a sound wave and its volume
The larger the amplitude, the louder the sound
What is the relationship between the frequency of a wave and the pitch of the sound
The higher the frequency, the higher the pitch
When sound travels from one medium to another, what two things can happen
It can reflect back into the original medium or it can be absorbed into the new medium ( or a combination of both )
What is an echo
A reflected sound wave
How are all types of sound produced
By a physical object vibrating or oscillating
