Go through and highlight important information. Coastal Weathering Mechanical weathering is breaking down rock without changing its chemical composition. Main type at the coast is freeze-thaw weathering. Chemical weathering breaks down rock and changes its chemical composition so rainwater is a weak acid that dissolves rocks. Mass Movement The shifting of rocks and loose material down a slope like a cliff. It happens when the material is full of water. Slides- material shifts in a straight line. Slumps- Material shifts with a rotation. Rockfalls- material breaks up and falls down a slope. Erosion Hydraulic Action- power of the waves forces into cracks causing the rock to break apart. Solution-dissolves. Attrition-rocks bash together become smaller. Abrasion-rocks rub against the cliffs. Corrasion-rocks are thrown at the cliffs Transportation and deposition Traction-rolls along bed. Saltation- bounces Suspension-tiny particles carried. Solution- dissolves Sand Beaches are flat and wide and made from deposition. Shingle beaches are steep and narrow. Spits- form at a bend in the coastline. Longshore drift moves the sand and deposits it. Winds make it curve at the end. Salt marsh forms behind the spit. Bars- When a spit joins 2 headlands together. Behind is a lagoon. Sand dune- Longshore drift moves sand up the beach. Obstacles decrease wind speed and sand is deposited and plants will start to grow. Plants stabilise the sand and forms embryo dunes. Overtime the oldest dunes migrate inland. Homework Go through and highlight important information. Produce a revision card on the outline. Answer the Exam question Landforms from erosion Waves cut platforms- erosion at the base of cliff causes a wave-cut notch. Nothing supports the cliff above and collapses causing cliff retreat. Headlands and bays- soft and hard rock next to each other. Soft rock erodes into a U shaped bay. Headlands stick out into the sea. Stacks- Headland eroded. Crack becomes a cave, then arch. Arch roof collapses and then a stack is formed. Durdle Door in Dorset-Arch Old Harry Dorset - Stack Waves Constructive waves- build up the beach (deposition). Strong swash and weak backwash. Small waves. Destructive waves- destroy beaches. (erodes) Weak swash and strong back wash. High waves,

Illustrate the formation of coastal features made from both erosion and deposition 9 marks ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Marks 1-3 Basic sentences about features of either erosion or deposition Marks 4-6 Able to show the formation of both erosion and deposition Marks 7-9 Able to explain the formation of features made by erosion and deposition in detail.