Class 9 Geography : Subject : Geography3. Exogenetic Process Part 1

Subject : Geography
3. Exogenetic Process Part 1
Questions and Answers
Q 1. Answer in brief.
(a) What is mechanical weathering ?
Ans: The disintegration of rocks without any change in their chemical composites called mechanic weathering..
(b) What are the main types of chemical weathering?
Ans: The process of decomposition of rocks due to changes in their chemical composition is called chemical weathering.
(c) How does biological weathering occur?
Ans: The weathering process caused by human beings, animals and plants is called biological weathering.
(d) Distinguish between weathering and mass wasting.
Ans:
Q 2. Write whether the statements are true or
false. Correct the incorrect ones.
*(a) Climate affects earthquakes.
Ans: False- Internal movements affect earthquake
*(b) Mechanical weathering is less effective
in humid climates.
Ans: True
*(c) Mechanical weathering happens on a
large scale in dry climates.
Ans:True
*(d) The breaking down of rocks into
smaller particles is called weathering.
Ans: True
*(e) Lateritic rocks are formed through
exfoliation.
Ans: False - Lateritic rocks are formed due to oxidation.
(f) Soil creep ia uncommon in areas with dry climate and gentle slopes.
Ans: False - It is a common phenomenon in such areas.
(g) Shattering is a type of mechanical weathering.
Ans: True
(h) Granular weathering occurs in areas of heavy rainfall.
Ans: True
Q 3. Complete the flowchart below.
Ans:
Q 4. Identify the type of weathering from the
given description.
(a) Some animals live inside the grounds by making burrows.
Ans: Biological weathering
(b) The rock rusts.
Ans: Chemical weathering
(c) Water which has accumulated in the crevices of the rocks freezes. Consequently, the rock breaks.
Ans: Mechanical weathering
(d) The pipes supplying water in colder regions break.
Ans: Mechanical weathering
(e) Sand formation occurs in deserts.
Ans: Mechanical weathering
Q 5. Using internet, look for incidences of a few landslides that have occurred in India and write about them briefly.

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