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Weathering, Erosion and Mass Movement
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Specification Detail
1.1b Types of weathering, erosion and mass movement on the coastline.
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Learning Objectives
● Define and explain the different types of weathering, erosion and mass movement.
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Definitions : Weathering● Weathering : Weathering is the breaking
down of rocks through contact with the atmosphere and waters
● In your book, write the definition and draw a small diagram of these three types of weathering.– Biological : Freeze thaw + Onion Skin– Chemical : – Physical :
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● Biological weathering p.28
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● Chemical weathering p.28
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● Frost shattering (freeze-thaw weathering) p.27
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● Exfoliation or onion-skin weathering p.27
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● Homework: Photograph an example of each of these processes.– Biological– Chemical– Physical
● You can email me the pictures if you take them on your phone.
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Definitions: Erosion● Erosion : The wearing away of material by
a moving force. E.g. water● BBC Bitesize: Here● Label and annotate each of these photos
describing how each process will erode the coast.
● Interactive diagram : Here– Hydraulic action– Corrasion / Abrasion– Corrosion– Attrition
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Label the forms of erosion
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Processes of river erosion
Hydraulic action
Attrition
Corrosion
Abrasion
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Which processes can you identify in the photograph?
Processes - Erosion
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Which processes can you identify in the photograph?
Hydraulic action (air compression plus force of water on cliff)
Corrasion (hurling of stones and pebbles by sea against rock face)
Corrosion / solution
Attrition (the knocking together of pebbles to reduce their size)
Processes - Erosion
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Definition: Mass Movement● Mass Movement: This process occurs
when material moves slope due to the pull of gravity (similar to an avalanche but more slowly and not with snow and ice)
● Pg: 44. Use the following pictures. Stick them in your book. Label them and explain the process.– Soil Creep: Gravity slowly pulling the water
contained in the soil down a slope.– Slumping: Common on coasts, large areas of
land slipping down a slope.
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Soil Creep
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Slumping
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● Impact of sub-aerial processes
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●Can you now…
Define:● weathering ● erosion ● mass movement.
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Mark Scheme
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Mark Scheme
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●Can you now…
Explain the different types of :
● weathering ● erosion ● mass movement.