Waves

     There are a lot of different of waves, there are Transverse, Longitudinal, Medium, Crest, Trough, Wave, Rarefaction's, Compression's.

Transverse waves

 Transverse waves are when particles vibrate in a up-and-down motion. They usually move in a right angle. The highest point of a transverse wave is called a crest, and the lowest point between each crest is called a trough.

    Longitudinal waves

 Longitudinal waves are when the particles of the medium vibrate back and forth along the path that the waves move. A part of a longitudinal wave where the particles are crowded together is called a compression. A part where the particles are spread apart is a rarefaction.