Connect: What has happened?
Lesson Focus: How do coastal processes shape the coastline? What: Learn how coastal landforms are created
through erosional processes How: Analyse photographs to annotate key features
and processes Why: Understand how coasts change over long
periods of time
This is a wave-cut platform. But how did it get there?
Wave-cut platform: • • • •
Erosion causes a notch to be cut into the cliff This leads to an overhang Eventually the overhang collapses, causing the cliff line to retreat The base of the cliff is left behind
Write the labels onto your own copy of this diagram and stick it in your book. Then add at least 2 sentences explaining it.
Erosion of the headland‌
http://www.bbc.co.uk/schools/riversandcoasts/coasts/change_coast/pg_11_flash.shtml
What erosional features can you see in this photo? Old Harry Rocks, Dorset
Does all this happen straight away? Discuss with the person next to you.
Old Harry Rocks
Stack
Collapsed
New cave forming
Undercutting means stack will collapse
Task: Complete the worksheet by adding in the correct key terms, then stick this sheet into your book.
Check your answers! A
B
C
D
Caves, Arches, Stacks and Stumps
A The waves erode FAULTS (cracks) in the headland. B The waves eventually erode through the headland to form an ARCH.
C The arch becomes unsupported and collapses to form a STACK.
D A STUMP is formed from the collapsed stack.
Annotate the main features on the series of photographs.
Extension: Add labels to your photographs which show the types of erosion taking place.
Create a story board… • You must include the following key words erosion cave
headland fault
stump stack
arch bay
• Draw at least 6 pictures with captions explaining features of coastal erosion • Give your storyboard a title and add some colour
An example Storyboard‌ A Storyboard explaining the features of Coastal Erosion.
Some rocks are weak and erode easily, whilst some are stronger and are less affected by erosion.
Weaker rock can be eroded away to create a bay in between two headlands
The strong rock headlands will have weak points too, and a fault line may form in one of the cracks.
The fault can be eroded to make a cave.
Next the cave can erode to make an arch.
If the arch collapses, a stack will be left standing.
The stack may topple over and leave a stump.
Eventually, the stump will erode away and nothing will be left
Peer Assessment • Swap your storyboard with someone else Have they included the 8 key words? Have they done detailed captions? Have they drawn clear pictures and coloured them?
• Give the person one positive comment and one thing to work on for next time • Write these on the back of their sheet
Homework: label this as homework in your book Complete the following GCSE style exam question: ď‚—For a physical landscape that you have studied: i)State the landform you will discuss. (1 mark) ii)Draw a simple labelled sketch to show the landforms. (1 mark for drawing, 2 marks for correct labels)
i) Using specific detail, explain how this landform was formed.
(4 marks- best answers will explain types of erosion and transportation processes) (TOTAL: 8 marks)
Reflect: Traffic Lights Use the traffic light system to reflect on something you have learnt today that: • you feel confident about • you’re growing confident towards • something you would still like to know