The geomorphic process which shape coastal landforms Core

The geomorphic process which shape coastal landforms. Core: Identify the processes which affect the coastal landforms including Long Shore Drift Challenge: Explain the link between coastal landforms and the geomorphic process. Aspire: Relate the geomorphic process to a case study example and identify human intervention.

Starter – How does a wave create changes in the beach everyday? From going in and out each day it moves SEDIMENT from one area of the beach to another.

The waves FORCE water into cracks in the rocks. This is called HYDRAULIC ACTION

The waves knock chunks of rock together. The rocks end up as pebbles on the beach This is called ATTRITION

The water DISSOLVES soluble material from the rocks. This is called SOLUTION

Rough seas fling pebbles against the rocks The pebbles act like sandpaper. This is called ABRASION

Waves force water into cracks in the rock, this pressure breaks up the rock called hydraulic action. The waves throw sand, pebbles and large stones against the rock. They wear it away like sand paper. This is called abrasion. SO REMEMBER: Chunks of rock get knocked together and worn into smaller pieces. This is called attrition. The water dissolves the rock. This is called solution.

Homework: Create a poster or presentation, preferably interactive, which explains the basics of Longshore drift Deadline: Thursday 20 th September 2018

Example interactive presentation Longshore Drift Direction of longshore drift movement Backwash is always at right angles to the beach swash Backwash Direction of prevailing wind

Deposition features Beaches – What are the features of a beach? Spits - Look at the diagram below, what is the main cause of a SPIT? https: //www. youtube. com/watch? v=U 9 Eh. Va 4 Mm. Es

https: //www. youtube. com/watch? v=U 9 Eh. Va 4 Mm. Es

Geomorphic processes Notes from video on erosion Accretion – opposite of _____, where rocks are deposited on the coast, increasing the coastal _____print 28% of UK ______ is eroding (on average by ____m per year) Landslips are where rock gets too _______ because the _____ of the cliff gets eroded ______ rock i. e. igneous rock formed usually from _____ (ignite) Soft rock i. e. sedimentary (made up of sediment, i. e. ______, pebbles, dead _____, etc. ) sed = seat or sit

Geomorphic processes Notes from video on erosion Accretion – opposite of erosion, where rocks are deposited on the coast, increasing the coastal footprint 28% of UK coastline is eroding (on average by 1. 8 m per year) Landslips are where rock gets too heavy because the bottom of the cliff gets eroded Hard rock i. e. igneous rock formed usually from lava (ignite) Soft rock i. e. sedimentary (made up of sediment, i. e. sand, pebbles, dead animals, etc. ) sed = seat or sit

Factors which affect the speed that the coastline is eroded: 1. Rock type 2. Wave type 3. If there’s a beach 4. Human activity (pollution/walking) 5. Vegetation Task: List these factors which affect the speed of coastal erosion. For each, write one sentence explaining how this affects erosion speed.

Assessment Questions Total /33 1. Name any 4 coastal landforms. (4) 2. Explain how 3 of those landforms are formed through weathering. (6) 3. Explain the 3 different types of weathering, giving an example for each one. (6) 4. Explain the process of Longshore Drift, either in sentences or using a labelled diagram. (10) 5. Explain the terms Abrasion, Attrition, Hydraulic Action and Solution. 6. Why do some cliffs get eroded and yet others do not? (4)