NCERT Solutions For Class 7 Science Chapter 9 : Soil

NCERT Solutions For Class 7 Science Chapter 9 PDF Free Download

NCERT solutions for class 7 Science chapter 9 Soil is one of the important topics for the students of 7th standard. The solutions for soil are provided here to help students in not only clearing their doubts but also to understand the chapter in an easy and more effective way.

The soil has massive applications; knowing more details about soil will help the students to face the exam confidently and to score good marks in the CBSE class 7 examination. We present various true and false, MCQ type questions regarding the classification of changes. Here, the chapter-wise solutions are also available in PDF format which students can access and download easily.

Download PDF of NCERT Solutions for Class 7 Science Chapter 9 Soil

NCERT solutions class 7 science chapter 9 part 1
NCERT solutions class 7 science chapter 9 part 2
NCERT solutions class 7 science chapter 9 part 3
NCERT solutions class 7 science chapter 9 part 4
NCERT solutions class 7 science chapter 9 part 5

Access Answers of NCERT Solutions for Class 7 Science Chapter 9 Soil

Exercise Questions

Tick the most suitable answer in questions 1 and 2.

1. 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

Solution:

The answer is (iii) minerals, organic matter, air and water.

2. The water holding capacity is the highest in

(i) sandy soil

(ii) clayey soil

(iii) loamy soil

(iv) mixture of sand and loam

Solution:

The answer is (ii) clayey soil

3. Match the items in Column I with those in Column II:

Column I

Column II

(i) A home for living organisms

(a) Large particles

(ii) Upper layer of the soil

(b) All kinds of soil

(iii) Sandy soil

(c) Dark in colour

(iv) Middle layer of the soil

(d) Small particles and packed tight

(v) Clayey soil

(e) Lesser amount of humus

Solution:

Column I

Column II

(i) A home for living organisms

(b) All kinds of soil

(ii) Upper layer of the soil

(c) Dark in colour

(iii) Sandy soil

(a) Large particles

(iv) Middle layer of the soil

(e) Lesser amount of humus

(v) Clayey soil

(d) Small particles and packed tight

4. Explain how soil is formed.

Solution:

Soil is formed due to the weathering of rocks. Weathering is a process in which physical breakdown and chemical decomposition of minerals takes place primarily by wind, water and climatic changes. In the weathering process, rocks are converted to small pieces which eventually turn to soil particles to form a layer of soil.

5. How is clayey soil useful for crops?

Solution:

Clayey soil is useful for crops for the following reasons

  • It has excellent water holding capacity
  • Clayey soil is rich in organic matter
  • Clayey and loamy soils are suitable for growing cereals like wheat.
  • Water holding-capacity of clayey soil supports the growth of crops like paddy which require more water to grow.

6. List the differences between clayey soil and sandy soil

Solution:

Clayey Soil

Sandy Soil

1. Particles are finer

Particles are larger

2 Particles are tightly packed

Particles are loosely packed

3. Holds a good amount of water

Water holding capacity is low

4. It is heavy in weight

It is light in weight

5. Rich in humus and organic nutrients

Not rich in humus and organic nutrients

6. Very little air is trapped between the particles

More air is trapped between the particles

7. Sketch the cross-section of soil and label the various layers.

Solution:

cross section of soil layers

8. Razia conducted an experiment in the field 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.

Solution:

Amount of water = 200 ml

Percolation time = 40 minutes

Percolation rate = calculation of water percolation rate

= percolation rate calculation

= 5ml/min

9. Explain how soil pollution and soil erosion could be prevented

Solution:

Soil pollution can be controlled by the following measures:

  • By reducing the use of plastics, we can reduce soil pollution.
  • By controlling the use of chemical fertilisers and pesticides, we can control soil pollution.

Soil erosion can be controlled by taking the following steps

  • Planting more and more trees will result in the reduction of soil erosion.
  • By stopping deforestation and avoiding overgrazing of animals.

10. Solve the following crossword puzzle with the clues given:

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.

Puzzles on Soil

Solution:

Across:

2. Erosion

5. Polythene

6. Clay

7. Earthworm

Down:

1. Wind

3. Wheat

4. Sandy

5. Profile

Important topics covered in NCERT Solutions for Class 7 Science Chapter 9 Soil

  1. Soil teeming with life
  2. Soil profile
  3. Soil types
  4. Properties of soil
  5. Moisture in soil
  6. Absorption of water by soil
  7. Soil and crops

These solutions for chapter 9 are created by subject experts according to the latest CBSE syllabus (2019-2020). Students must practice the solutions regularly to prepare effectively for their examination.

These NCERT Solutions will help students in revising all the class 7 science chapters so that they can increase knowledge of Science.

Stay Tuned to BYJU’S for NCERT Solutions for Class 4 to Class 12.

Frequently Asked Questions on Soil

How soil is formed?

Soil is formed due to the weathering of rocks. Weathering is a process in which physical breakdown and chemical decomposition of minerals takes place primarily by wind, water and climatic changes. In the weathering process, rocks are converted to small pieces which eventually turn to soil particles to form a layer of soil.

How is clayey soil useful for crops?

Clayey soil is useful for crops for the following reasons

  • It has excellent water holding capacity
  • Clayey soil is rich in organic matter
  • Clayey and loamy soils are suitable for growing cereals like wheat.
  • Water holding-capacity of clayey soil supports the growth of crops like paddy which require more water to grow.

How soil pollution could be prevented?

Soil pollution can be controlled by the following measures:

  • By reducing the use of plastics, we can reduce soil pollution.
  • By controlling the use of chemical fertilisers and pesticides, we can control soil pollution.

How soil erosion could be prevented?

Soil erosion can be controlled by taking the following steps

  • Planting more and more trees will result in the reduction of soil erosion.
  • By stopping deforestation and avoiding overgrazing of animals.

2 Comments

  1. Mujhe chapter 9 ka solution chahie

    1. It’s already available.

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