Draw a wave shape to represent a sound wave. Label this 'A'. Add a second wave to represent a sound wave with a higher pitch. Label this 'B'

The diagram shows a range of frequencies.

Copy the diagram. Shade the region of frequencies that we can normally hear.

Copy the diagram and shade the region known as ultrasound.

Copy and complete the table, which describes different regions in a sound wave. Write compression and rarefaction in the correct box in the first column.

The vibrations of a sound can be detected using a microphone and then displayed on an oscilloscope screen. The diagram shows three such traces.

Which trace shows the loudest sound? Explain your answer.