- Sketch a transverse wave and label the amplitude, crest and trough. Also, label the wavelength of the wave in two places.
- Draw a line to represent the undisturbed position of the wave and label it clearly.
- Copy these three important definitions.
*The amplitude of a wave is the maximum displacement of a point on a wave away from its undisturbed position.**The wavelength of a wave is the distance from a point on one wave to the equivalent point on the adjacent wave.**The frequency of a wave is the number of waves passing a point each second.*

- What is meant by the period of a wave?
- Write down an equation in terms of the period that can be used to work out the frequency of a wave.
- What are units of frequency?
- What are the units of the period of a wave – tick-tock?
- Copy the following definition of a wave.
*The wave speed is the speed at which the energy is transferred (or the wave moves) through the medium.* - Consider this equation:
- Can you rearrange it so that speed, frequency and wavelength are all the subject of the equation? E.g. frequency =, wavelength =
- Describe a method to measure the speed of sound waves in air.
- Describe a method to measure the speed of ripples on a water surface.

**Physics Only **

- What happens to the speed of sound waves when they enter a denser medium? E.g from air into water.
- What happens to the frequency of sound waves when they enter a denser medium?
- What happens to the wavelength of sound waves when they enter a denser medium?

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