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Waves and Cliffs Aim: to understand different types of waves and how cliffs disappear.

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Presentation on theme: "Waves and Cliffs Aim: to understand different types of waves and how cliffs disappear."— Presentation transcript:

1 Waves and Cliffs Aim: to understand different types of waves and how cliffs disappear

2 What's the difference? In your books write down 3 differences you can see from these pictures

3 http://whs.moodledo.co.uk/file.php/1365/Co astal%20Systems/Wave%20Motion.swf http://whs.moodledo.co.uk/file.php/1365/Co astal%20Systems/Wave%20Motion.swf http://www.curriculumbits.com/prodimages/ details/geography/geo0003.html http://www.curriculumbits.com/prodimages/ details/geography/geo0003.html

4  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schools Constructive Waves Spilling Breaker Powerful Swash Weak Backwash

5  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schools Destructive Waves Crashing breaker Weak swash Powerful Backwash

6 Constructive and Destructive Waves Copy the 2 diagrams and label the keywords. Keywords: Strong Backwash, Coastline, Strong swash, Weak swash, Weak Backwash, build up and deposit sediment, beach eroded, Coastline. EXT: Which beach would you sunbathe on and why?

7 Wave Cut Platform

8  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schools Joints and beds allow waves to attack the cliff more easily Waves can use rocks to erode the cliff Wave cut platform Wave cut notch Cliff line HIGH TIDE LEVEL

9  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schools The force of the waves pushes air into cracks in the rock The compressed air exerts enormous pressure at the tip of the crack. As the water falls back the air pressure is released and rock is pulled out from the crack further enlarging the hole.

10  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schools Wave-cut platformWave built terrace large angular rocksrocks and pebbles soft sand Ouch!

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12 ExL What is longshore drift? – Don’t copy and paste – Images – Diagram – Description in your OWN WORDS


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