1. Can you guess the title of today’s lesson?

2. Waves 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.

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

4. 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.

5. Transverse Waves

6. Longitudinal Waves

7. Examples of Waves Transverse Waves Sea waves Seismic waves Electromagnetic waves – Light waves – Microwaves – Radio waves Longitudinal Waves Sound waves Seismic waves

8. Wave Properties

9. Task 1 Complete the worksheet on waves properties. – Worksheet P1.5b

10. Waves continued...

11. Blending Wavelength Amplitude FrequencyHz Longitudinal waves Sound waves Wave speed Transverse waves

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

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

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

15. Example 2 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

16. Example Questions Question 4 from active book.

17. Task 2 Complete the calculation worksheet. – Worksheet P1.5

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