State which physical parameter of a sound wave must be increased to increase the volume of the sound.

State which physical parameter of a sound wave must be increased to raise the pitch of the sound.

Sound waves propagate through air as longitudinal waves.

Light is a well-known example of a transverse wave. Name another example of a transverse wave.

Describe how the oscillations of longitudinal waves and transverse waves differ in relation to the direction of energy propagation.