Practice drawing and labelling the different types of waves. Learn the difference between transverse and longitudinal waves. Practice using the triangle method to help you with the wave formula. Have a go at loads of example questions. Main Lesson You might not realise it, but you use waves everyday of your life.
Light is a type of wave, so is sound.
The infra-red control you use to turn on your TV uses a special type of wave. The electricity you use to make your home computer work can be thought of as a type of wave. These are the sort of waves that you can make by moving a slinky spring back and forth. Sound waves are an example of longitudinal waves. Here are two diagrams showing a transverse and a longitudinal wave.