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Contents
8G Rocks and Weathering
Physical weathering
Biological weathering
Chemical weathering
After weathering
Summary activities
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Rocks and weathering
Why are rocks all different shapes and sizes?
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Rocks and weathering
Rocks are different shapes
and sizes because they are
changed by the conditions
in their environment.
The breakdown of rocks into
smaller fragments is called
weathering.
There are three types of weathering:
physical weathering
chemical weathering
biological weathering
What factors cause these different types of weathering?
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How can freezing cause damage?
What will happen to a glass bottle containing a liquid
if it is left in a freezer for too long?
It shatters! The liquid inside
the bottle expands
as it freezes.
The ice formed
creates huge forces
on the glass which
then cause the
bottle to break!
How does this explain why water pipes often burst in winter?
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Freeze-thaw weathering
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