depeneds on the wave
primary wave
Sound travels as a wave.
trough wave
It would be a longitudinal wave. If you were to conduct an experiment to see which wave travels in the same direction as the disturbance, you would take a slinky and push it. And if you watch the wave, you'll see that it travels through the slinky outward, and travels back to the disturbance (your hand). This wave is a longitudinal wave.
The distance that a wave travels in a certain amount of time is a wavelength. Wrong,it's speed.(:
surface waves
The general term for what a wave travels through is a medium, but in the case of earthquakes the wave travels through the ground.
primary wave
That is a longitudinal wave.
The speed of a wave is how far the wave travels in one unit of time.
Sound travels as a wave.
Sound is a longitudinal, mechanical wave that requires a medium.
The material through which a wave travels is called the medium.
A body wave is a seismic wave that travels through Earths interior.
How quickly the wave travels
A tsunami wave is a wave of energy that travels through water, while a seismic wave is a wave of energy that travels through earth.
Up to a crest, then down through a trough, then back. APEX :P