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Shaping the Landscape Weathering

Shaping the Landscape Weathering . Connections Pg 6-7 LO: To know the four processes of weathering. Weathering . What is weathering and how does it work? . To this… Why?. From this…. What is weathering?.

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Shaping the Landscape Weathering

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  1. Shaping the Landscape Weathering • Connections Pg 6-7 • LO: • To know the four processes of weathering

  2. Weathering What is weathering and how does it work? To this…Why? From this…..

  3. What is weathering? Weathering is the breaking down or wearing away of minerals where they lie (in situ). A good example is letting a boiled sweet dissolve in your mouth without biting it.

  4. What is weathering? Weathering produces some spectacular landscapes …

  5. Types of weathering Generally, there are three main types of weathering Freeze Thaw Weathering Chemical weathering Biological weathering

  6. Freeze thaw weathering Keywords Cracks in rock; freezes = water expands; thaws = water contracts; repeating = cracks breaking up, rock splits; forms scree

  7. Freeze thaw weathering

  8. Biological weathering Key words Plants or animals; seeds in cracks; moisture = roots grow; widen cracks; rock falls apart and get into soil

  9. Chemical weathering

  10. Chemical weathering Keywords Rainwater = v weak acid; acid attacks rock; rock rots away/crumbles and enters soil; speeded up by heat; churchyards Limestone pavements are an excellent example

  11. Task One Connections pg 7, Activities 1b-4 Task Two • Green book called “Geography” pg 101-102 • Read pg 101 • Do Activites 1 & 2 on pg 101 & 102 • Copy Key words on pg 101

  12. AYERS ROCK

  13. Task Place the following phrases in the correct box to show the process of biological weathering Roots develop Roots break up rock Crack gives moisture and shelter Seeds blow into crack Tree grows

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