LESSON AIM To understand why coastlines are different across the whole world
Coasts are different because of • EROSION • Coastal Erosion is the wearing away of the land by the sea. • Different types of rocks wear away at different speeds and in different ways.
Types of erosion • Hydraulic Action. This is the force of water hitting the cliff and squeezing air into the cracks in the rock • Abrasion. This is the force of the bits of rock carried in the water blasting into the cliff. • Attrition. This is the process of rocks hitting each other and breaking into smaller rocks • Corrosion. This is a chemical reaction between the sea water and the minerals in the rocks
The secret art of Coastal kung fu!Hydraulic Action: make punching movements with hand- demonstrates force of water hitting cliff. Abrasion: make a throwing gesture with hands like you are throwing dealing cards very rapidlyAttrition: make 2 fists, and then bring them towards each other, hitting each other, then open hand to resemble a stone breaking.Corrosion: have arms out stretched in front of you, waving fingers, and moving arms downwards. Sound effect of something dissolving is needed.