weathering of rocks
TRANSCRIPT
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Define weathering
Differentiate mechanical
weathering from chemical
weatheringCite examples of mechanical
weathering and chemical
weathering
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Process of breaking
down rocks into
smaller pieces.
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Water
Wind
Ice
Plants
Animals
People
Chemicals
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physical weathering Breaking down of rocks without
any change in their chemical
compositions
Wind, water, gravity, plant,
animal and human activit ies
are some of the causes of this
weathering.
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Abrasion
Freezing and Thawing
Animal Activi t ies
Human Activi t ies
Plant Activi t ies
Exfol iat ion
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When rocks coll ide one
another or scrape
against each other,
their exposed surfaces
can be chipped or
f ractured.
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Outer layers of rocks
feel off .
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Takes place when the nature
and composition of rocks
change.
Breaking of rocks due to the
reaction of acids or oxygen.
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Carbonation
Oxidation
Hydrolysis
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Takes place when dissolved carbon
dioxide present in water and air
forms carbonic acid.
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hydrogen in rainwater reacts with the
minerals in the rocks, changing them
to clay.
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When oxygen
combines with
i ron in rocks, i t
changes into iron
oxide.
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Write TRUE if the sentence is correct
and FALSE i f not.
1. Weather ing breaks rocks in to pieces .
2 . Because of weather ing, the sur face of the
ear th keeps on changing.
3 . Acid and oxygen are the greates t agents
of chemical weather ing .
4. When oxygen combines wi th i ron in rocks ,
su l fu r ox ide is formed.
5. The process by which sand and smal l rocks
scratch other rocks is cal led abras ion .