Can you guess the title of today’s lesson?

Learning Objectives
• MUST - describe what waves are, including the terms, wavelength, amplitude, frequency and speed.
• SHOULD - differentiate between longitudinal and transverse waves.
• MIGHT - use wave equations.

• List as many different types of waves as you can.
• What are the similarities and differences between the waves.

• Waves transfer energy and information, they do not transfer matter.
• Example - Sea waves transfer energy from the waves to the shore, water particles only move up and down as a wave passes.

Longitudinal Waves

Transverse Waves
• Sea waves
• Seismic waves
• Electromagnetic waves
– Light waves
– Microwaves
– Radio waves
Longitudinal Waves
• Sound waves
• Seismic waves

• Complete the worksheet on waves properties.
– Worksheet P1.5b

Blending
Wavelengt h
Amplitude
Longitudinal waves
Frequency Hz
Sound waves
Wave speed
Transverse waves

• How fast the energy in a wave travels is the
wave speed. There are two ways to work this out.

Example 1
• If a wave carries a surfer 52 meters in 8 seconds, the wave speed is?
• 52/8 = 6.5m/s

• The wave speed is also linked to the wave frequency and wavelength:
Wave speed (m/s) = frequency (Hz) x wavelength (m)

• If some waves of 13 m wavelength have a frequency of
0.5 Hz then the wave speed is?
• V = 0.5 x 13 = 6.5 m/s

Example Questions
• Question 4 from active book.

• Complete the calculation worksheet.
– Worksheet P1.5

Quiz Time
• Answer the questions in your books.
• You may wish to use a calculator.
Don’t forget units!