waves
In class we are learning about energy waves. If the waves go up and down then it is an transverse wave and if the waves go from side to side it is an longitudinal wave. The highest point of a transverse wave is called the crest and the lowest poing of the transverse wave is the trough. Throughout the longitudinal wave there is the compression which is when the coils are close together and the rarfaction is when the coles are farther apart. The waves are caused by vibrations. The material through which the waves travle is called a medium. There are more then one mediums. There are gasses (such as air), liquids (such as water), and solids (such as the earth).
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