Waves - SCIENCE 8
NEW Wave Unit Middle School Science 8
Terms in this set (37)
wave that requires a medium (matter) through which to travel and transfer energy.
A disturbance that travels from one place to another transporting energy.
the matter through which a wave travels
maximum distance a wave rises and falls from its rest position.
From "REST to CREST."
the distance from two corresponding parts of a wave (crest to crest or trough to trough)
how many waves pass a given point per second; measured in Hertz (Hz)
highest portion of a wave
lowest portion of a wave
the part of a longitudinal wave where the particles of the medium are closer together (dense)
the part of a longitudinal wave where the particles of the medium are farther apart (less dense)
mechanical wave where energy moves perpendicular to particle motion (up & down) like doing the wave in a stadium.
A mechanical wave where energy moves in the same direction as the wave, like pulling a slinky back and then letting it go.
unit for frequency; cycles per second;wavelengths per second
wave speed or velocity
How much Energy the wave has. The distance a wave travels in a certain direction. m/s; wavelength x frequency
A type of wave that moves through matter and then vibrates our ear so we can hear.
A kind of wave made of photons that lets us see.
Examples of mechanical waves:
Sound, seismic, water waves, waves in a spring.
Can travel through a vacuum (empty space)
Examples of electromagnetic waves :
Light, microwaves, radio waves, and X-rays.
Sound travels more quickly through...
A dense medium, like metal.
Sound travels less quickly through...
A less dense medium, like air.
Sound can NOT travel through...
A vacuum, like space.
When waves are absorbed by a surface like acoustic tiles and fiberglass.
Waves move around an obstacle and change directions.
Waves bending when they enter a medium with a different density.
A wave with high energy is...
A wave with high Amplitude. Picture it!
Formula to find frequency
Velocity divided by wavelength
Formula to find Velocity
Wavelength x frequency
When waves bounce back off a surface. An example is an echo.
Very low frequency waves travel...
A long distance (like an elephant's sounds)
In tuning fork lab, increased force =
increased splash, bigger waves
To be heard by humans, sound waves must be ...
greater than 20 hertz but less than 20,000 hertz.
The tendency of an object to vibrate at the same frequency as another vibrating source, like a soprano's high note breaking glass.
Surface wave motion is
Sentiment particles are caused by
Check this: increased by rough surface? Diffraction?
Short wavelength =
Long wavelength =
equals high energy