1. Date: 3-Sep-15Aim – What are constructive and destructive waves? Waves What are constructive and destructive waves? Why?They cause different landforms along the coast

2. Date: 3-Sep-15Aim – What are constructive and destructive waves? Waves What are constructive and destructive waves? Introduction Wave gallery Wave gallery Introduction Wave gallery Wave gallery Mix-match Most-likely / least likely Most-likely / least likely Most-likely / least likely Most-likely / least likely Beat the teacher: Beat the teacher: 2 wave types 2 wave types Beat the teacher: Beat the teacher: 2 wave types 2 wave types

3. Date: 3-Sep-15Aim – What are constructive and destructive waves? Constructive and Destructive waves

4. Date: 3-Sep-15Aim – What are constructive and destructive waves? Storm waves South Africa Durban Extremely long fetch

5. Date: 3-Sep-15Aim – What are constructive and destructive waves? Mexican waves

6. Date: 3-Sep-15Aim – What are constructive and destructive waves? Royal wave

7. Date: 3-Sep-15Aim – What are constructive and destructive waves?1. Circular orbit in open water 2. Wave becomes more elliptical in movement 3. Friction slows down base of wave 4. Water from previous wave returns as backwash 5. Shelving sea bed (beach) 6. Water rushes up the beach as swash 7. Increasingly elliptical orbit 8. Top of wave moves faster 9. Wave begins to break 10. Formation of a wave Can you match these labels with the stars on the diagram? Animation – Wave Wave 2 types 2 types2 types2 types

8. Date: 3-Sep-15Aim – What are constructive and destructive waves? Most likely to… Most likely to have a strong swashMost likely to have a strong swash Most likely to have a strong backswashMost likely to have a strong backswash Most likely to be tallMost likely to be tall Most likely to have a long wavelengthMost likely to have a long wavelength Most likely to occur in winterMost likely to occur in winter Most likely to be a steep waveMost likely to be a steep wave Most likely to be powerfulMost likely to be powerful Most likely to build up a beachMost likely to build up a beach Most likely to be slow moving wavesMost likely to be slow moving waves Most likely to be a longer time between each waveMost likely to be a longer time between each wave Constructive Destructive

9. Date: 3-Sep-15Aim – What are constructive and destructive waves? Beat the teacher Constructive waves are sometimes known as surfing waves and mainly occur in summer. They help to build beaches up with their strong backwash. They move fast unlike destructive waves. Destructive waves are small, steep waves that are mainly found in winter, during stormier conditions. They have a strong swash and remove beach material. Destructive waves have a long wave period unlike constructive waves.

10. Date: 3-Sep-15Aim – What are constructive and destructive waves? Homework For a set number of places around the coast, work out the fetch and whether you’re likely to get constructive or destructive wavesFor a set number of places around the coast, work out the fetch and whether you’re likely to get constructive or destructive waves