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Wave Types 
Waves carry energy from one place to another. Sound, light and radio signals all travel in the form of waves. 
There are two types of waves. 
Transverse - A slinky spring held at one end and vibrated at right angles to the length of the spring will show this wave type. 
The wave moves the spring up and down. 
Longitudinal - A slinky spring held at one end vibrated parallel to the length of the spring will show this wave type. 
The wave pushed the coils together then stretches them apart as it passes along the spring.

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