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Starter- name that feature!

Starter- name that feature!. Lesson 4- Weathering Processes. Lesson Objective: To understand the physical processes which act on coastal geology to create distinctive coastal landforms.

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Starter- name that feature!

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  1. Starter- name that feature!

  2. Lesson 4- Weathering Processes Lesson Objective: To understand the physical processes which act on coastal geology to create distinctive coastal landforms

  3. WEATHERING- IS THE BREAKDOWN OF ROCKS IN SITU. THIS MEANS IT HAPPENS WHERE THE ROCK IS. ROCKS ARE WEAKENED BY BEING CHEMICALLY ATTACKED AND MECHANICALLY BROKEN DOWN. • Use page 74 Evolving Planet to find out what these types of weathering are: • Mechanical Weathering • Chemical Weathering • Biological Weathering • Sub-aerial processes

  4. MASS MOVEMENT-IS THE MOVEMENT OF MATERIALS DOWNSLOPE, SUCH AS ROCK FALLS, LANDSLIDES OR CLIFF COLLAPSE. • The coast can also change shape by processes of mass movement; this includes: • Rock falls • Slumping of cliffs

  5. Why do cliffs collapse? There are several reasons why cliffs collapse: • Marine processes cliff bases eroded by hydraulic action and abrasion= steeper cliff • Weathering weakens rocks • Heavy rain saturates permeable rock at the top. May also erode cliff faces as it goes down • Water flows through permeable rock adding to the weight of the cliff • Human actions buildings add to the weight which can push down onto a weak cliff.

  6. Which other factors affect coastlines? You have seen all the physical ways in which coasts are affected. How else could the coast be affected? Discuss with your partner and then share ideas with the class. • Changing sea levels and storm activity • Storms at sea • Climate change flood risk Read page 75 of Evolving Planet and 80 of GCSE Geography. Under the 3 headings above add at least 5 bullet points to explain how they can also affect the coastline. Add examples of areas that will be affected.

  7. Plenary- Discuss with a Partner RAG your understanding of the unit so far. • In your book RAG your understanding and ability to answer the following questions: • Would you be able to explain a process of transportation? • Would you be able to explain the role of erosion in changing coastal landscapes? • Would you be able to describe different types of waves and how they are formed? • Would you be able to link the impacts of climate change?

  8. Exam-style question • Using examples, explain how sea level rise could threaten people and their property. (6 marks)

  9. Homework • Use the Met Office website http://www.metoffice.gov.uk To research the 1953 flood under the headings Causes and Impacts. Explain why the Thames Barrier was built.

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