Task 2c: Make notes that:

• State whether sound waves consist of longitudinal or transverse waves

• Draw a diagram of a longitudinal wave and label the areas of compression and rarefaction

• Draw a diagram of a transverse wave

• Compare longitudinal and transverse waves. Keywords to use: vibrations, perpendicular, parallel

• Explain whether or not sound waves can travel through a vacuum.

• Suggest reasons why sound waves can agitate a liquid for cleaning objects.

• Suggest which state of matter sound travels through fastest

Task 4c: Make notes that:

• Explain why sounds travel fastest through solids

• Draw and label a diagram of the ear

• Explain how the ear hears sounds

• List causes of hearing loss

Task 5c: Make notes that:

• Define an ‘echo’

• Describe the features a room needs to have to maximise echoes

• Describe the features a room needs to have to minimise echoes

• Explain how echoes can be used in echolocation

• Give specific examples

• Give the equation that links distance, speed and time

Task 5d: Complete the handout and check your answers

Task 6b: Make notes that:

• Compare the hearing range of different animals

• Give the hearing range of humans

• Using the data in the table:

  • Identify whether your data are categoric or continuous.

  • Identify the most suitable type of graph to draw.

  • Plot a graph.

  • Identify any anomalies and circle them

  • Draw a line of best fit

  • Identify a qualitative relationship.

  • Identify a quantitative relationship.

  • Extrapolate your graph to estimate the highest frequency heard by a 70 year old

Complete the quiz to make sure you understand this unit.