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L2 ap weathering and mass movementn
1. Aim: To understand how
weathering and mass movement
processes occur along the coast
2. Quick Recap
• Can you remember from last lesson what the
following words mean?
• Fetch
• Beach
• Crest
• Swash
• Backwash
• Constructive
• Destructive
A clue!
6. A) Processes of Weathering
• These are _____________ that break down rocks
in one place which involves no ____________ . It
differs to erosion, as erosion needs movement to
______ .
A. Processes, water, explode
B. Processes, movement, work
C. Animals, movement, ignite.
D. People, machines, erupt
8. • This is the most common.
• It involves the alternative actions of freezing
and melting.
• It only occurs in places where there the
temperature fluctuates around 0 degrees.
9.
10.
11.
12.
13. 2) Chemical Weathering
• This is also known as solution. Like sugar
dissolves in tea, some rocks (e.g. Limestone)
and minerals dissolve in rainwater.
14. 2) Chemical Weathering
• The traces of acid in rainwater (water + carbon
dioxide = weak carbonic acid) form a chemical
reaction between the acid and limestone.
• This can form ‘limestone pavements’.
16. 3) Biological Weathering
• Plant and animals may weaken rock structure.
E.g. sand martins along the Norfolk coastline.
17. B. Processes of Mass Movement
• Rock fall - here
• Landslide
• Mudflow
• Slump – rotational slip
• Using the worksheet,
complete the four
diagrams to show
these processes using
your text book p147
