NCERT Solutions for Class 7 Science Soil [Old Book]
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Book Name: Science
Subject: Science
Chapter Number: 9
Chapter Name: Soil
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Book Name: Science
Subject: Science
Chapter Number: 9
Chapter Name: Soil
You can also bookmark this page by clicking + Save to Library icon and refer to these NCERT Solutions anytime from your account. More Detail
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NCERT Solutions for Class 7 Science Soil [Old Book] – Text
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Page 1
NCERT
SOLUTIONS
CLASS - 7TH
aglase .co
SOLUTIONS
CLASS - 7TH
aglase .co
Page 2
Book : Science Ncert Solutions | Chapter-9 Science
Class : 7th
Subject : Science
Chapter : 9
Chapter Name : Soil
Q1 Tick the most suitable answer in question 1 and 2.
In addition to the rock particles, the soil contains
(i) air and water
(ii) water and plants
(iii) minerals, organic matter, air and water
(iv) water, air and plants
Answer. (iii) minerals, organic matter, air and water
Q2 The water holding capacity is the highest in
(i) sandy soil
(ii) clayey soil
(iii) loamy soil
(iv) mixture of sand and loam
Answer. (ii) clayey soil
Q3 Match the items in Column I with those in Column II:
Class : 7th
Subject : Science
Chapter : 9
Chapter Name : Soil
Q1 Tick the most suitable answer in question 1 and 2.
In addition to the rock particles, the soil contains
(i) air and water
(ii) water and plants
(iii) minerals, organic matter, air and water
(iv) water, air and plants
Answer. (iii) minerals, organic matter, air and water
Q2 The water holding capacity is the highest in
(i) sandy soil
(ii) clayey soil
(iii) loamy soil
(iv) mixture of sand and loam
Answer. (ii) clayey soil
Q3 Match the items in Column I with those in Column II:
Page 3
Book : Science Ncert Solutions | Chapter-9 Science
Q4 Explain how soil is formed.
Answer. Soil is formed through the process of weathering. Weathering is a process of physical
breakdown and chemical decomposition of rocks and minerals near or at the surface of the earth.
This physical and chemical decomposition is primarily done by wind, water, and climate. As a
result of these processes, large rock pieces are converted into smaller pieces and eventually to soil.
Q5 How is clayey soil useful for crops?
Answer. Due to the very small size of the particles of clayey soil, particles are packed tightly and
therefore can retain water. Clayey soil is also rich in organic matter. For growing crops such as
wheat, gram, and paddy, the soil that is good at retaining water and rich in organic matter is
suitable. Therefore, clayey soils having these characteristics are useful for such kind of crops.
Q6 List the differences between clayey soil and sandy soil.
Q4 Explain how soil is formed.
Answer. Soil is formed through the process of weathering. Weathering is a process of physical
breakdown and chemical decomposition of rocks and minerals near or at the surface of the earth.
This physical and chemical decomposition is primarily done by wind, water, and climate. As a
result of these processes, large rock pieces are converted into smaller pieces and eventually to soil.
Q5 How is clayey soil useful for crops?
Answer. Due to the very small size of the particles of clayey soil, particles are packed tightly and
therefore can retain water. Clayey soil is also rich in organic matter. For growing crops such as
wheat, gram, and paddy, the soil that is good at retaining water and rich in organic matter is
suitable. Therefore, clayey soils having these characteristics are useful for such kind of crops.
Q6 List the differences between clayey soil and sandy soil.
Page 4
Book : Science Ncert Solutions | Chapter-9 Science
Q7 Sketch the cross section of soil and label the various layers.
Soil pro le
Q8 Razia conducted an experiment in the eld related to the rate of percolation. She observed that
it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of
percolation.
Q7 Sketch the cross section of soil and label the various layers.
Soil pro le
Q8 Razia conducted an experiment in the eld related to the rate of percolation. She observed that
it took 40 min for 200 mL of water to percolate through the soil sample. Calculate the rate of
percolation.
Page 5
Book : Science Ncert Solutions | Chapter-9 Science
Answer. Given amount of water = 200 mL
Percolation time = 40 min
Q9 Explain how soil pollution and soil erosion could be prevented.
Answer. Prevention of soil pollution:
The persistent build-up of toxic compounds in the soil is de ned as soil pollution. To prevent soil
pollution, its causes must be controlled.
(i) Plastics and polythene bags destroy the fertility of soil. Hence, they should be disposed
properly and if possible, their use should be avoided.
(ii) Some waste products from industries and homes pollute soil. These pollutants should be
treated chemically to make them harmless before they are disposed.
(iii) Other pollutants of soil include pesticides and insecticides. Therefore, excessive use of these
substances should be avoided.
Prevention of soil erosion:
Removal of the upper fertile layer of the soil (top soil) by strong wind and owing water is known
as soil erosion. Roots of plants bind the soil rmly and prevent soil erosion. Absence of plants
leads to soil erosion. Therefore, soil erosion can be prevented by planting trees and checking
indiscriminate cutting of trees.
Page : 106 , Block Name : Exercise
Q10 Solve the following crossword puzzle with the clues given:
Answer. Given amount of water = 200 mL
Percolation time = 40 min
Q9 Explain how soil pollution and soil erosion could be prevented.
Answer. Prevention of soil pollution:
The persistent build-up of toxic compounds in the soil is de ned as soil pollution. To prevent soil
pollution, its causes must be controlled.
(i) Plastics and polythene bags destroy the fertility of soil. Hence, they should be disposed
properly and if possible, their use should be avoided.
(ii) Some waste products from industries and homes pollute soil. These pollutants should be
treated chemically to make them harmless before they are disposed.
(iii) Other pollutants of soil include pesticides and insecticides. Therefore, excessive use of these
substances should be avoided.
Prevention of soil erosion:
Removal of the upper fertile layer of the soil (top soil) by strong wind and owing water is known
as soil erosion. Roots of plants bind the soil rmly and prevent soil erosion. Absence of plants
leads to soil erosion. Therefore, soil erosion can be prevented by planting trees and checking
indiscriminate cutting of trees.
Page : 106 , Block Name : Exercise
Q10 Solve the following crossword puzzle with the clues given:
Page 6
Book : Science Ncert Solutions | Chapter-9 Science
Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.
Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil.
Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.
Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil.
Page 7
Book : Science Ncert Solutions | Chapter-9 Science
Page : 106 , Block Name : Exercise
Page : 106 , Block Name : Exercise
Document Details
| Board / Org | NCERT |
| Exam | Class 7 |
| Type | Solution |
| Pages | 7 |
| Updated | 30 Apr 2026 |