Define weathering

Differentiate mechanical

weathering from chemical

weatheringCite examples of mechanical

weathering and chemical

weathering

Process of breaking

down rocks into

smaller pieces.

Water

Wind

Ice

Plants

Animals

People

Chemicals

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.

Abrasion

Freezing and Thawing

Animal Activi t ies

Human Activi t ies

Plant Activi t ies

Exfol iat ion

When rocks coll ide one

another or scrape

against each other,

their exposed surfaces

can be chipped or

f ractured.

Outer layers of rocks

feel off .

Takes place when the nature

and composition of rocks

change.

Breaking of rocks due to the

reaction of acids or oxygen.

Carbonation

Oxidation

Hydrolysis

Takes place when dissolved carbon

dioxide present in water and air

forms carbonic acid.

hydrogen in rainwater reacts with the

minerals in the rocks, changing them

to clay.

When oxygen

combines with

i ron in rocks, i t

changes into iron

oxide.

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 .