# NCERT Solutions for Class 7 Science Chapter 9 Soil

NCERT solutions for class 7 science chapter 9 soil: In this chapter, you will study that soil is one of the most important natural resources. It provides anchorage to the plants and plays an important role to hold them in one place and also supplies water and nutrients. You also know that it is the home of many living organisms. In the solutions for NCERT class 7 science chapter 9 soil, you will get questions based on the different types of soil, its composition, and its importance. In CBSE NCERT solutions for class 7 science chapter 9 soil you will learn that soil is very essential for agriculture because it provides food, clothing, and shelter for all. You must have experience the earthy fragrance of soil after the first rain after long, is always refreshing. As you know, the weathering of rocks produces small particles of various materials like sand and clay. Inside the chapter you will learn that the relative amount of sand and clay depends upon the rock from which the particles were formed, that is the parent rock. In NCERT solutions for class 7 science chapter 9 soil you will get questions based on the soil profile and their properties. If you need help in finding solutions of NCERT book to any other class, then don't worry NCERT solutions will help you out.

Here are the important topics of CBSE NCERT solutions for class 7 science chapter 9 soil mentioned below:

9.1 Soil Teeming With Life

9.2 Soil Profile

9.3 Soil Types

9.4 Properties of Soil

Percolation Rate of Water in Soil

9.5 Moisture in Soil

9.6 Absorption of Water by Soil

9.7 Soil and Crops

After going through this chapter, you must be able to get the NCERT solutions for class 7 science chapter 9 soil of these questions which are mentioned below, as these questions are from the Science book of NCERT.

Solutions for NCERT class 7 science chapter 9 soil: Solved Exercise Questions:

Tick the most suitable answer in question

Q1. 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

In addition to the rock particles, the soil contains (iii) minerals, organic matter, air and water.

The uppermost layer of soil is rich in humus and minerals. The humus makes the soil fertile and provides nutrients to growing plants.

Tick the most suitable answer in question 2.

Q2. The water holding capacity is the highest in
(i) sandy soil
(ii) clayey soil
(iii) loamy soil
(iv) mixture of sand and loam

(ii) Clayey soil

The particles in clayey soil are very fine and are packed together tightly. This provides high water retention capacity. Thus, clayey soil has the highest water holding capacity.

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

 Column I Column II A home for living organisms (b) All kinds of soil Upper layer of the soil (c) Dark in colour Sandy soil (a) Large particles Middle layer of the soil (e) Lesser amount of humus Clayey soil (d) Small particles and packed tight

The breaking down of rocks by the action of wind, water and climate is known as weathering. Soil is formed by the process of weathering.

The type of rock decides the nature of soil  formed and the type of vegetation that grows in it.

Clayey soil is very useful for crops for the following reasons:

(i) It has the highest water retaining capacity.

(ii) It is very fertile because of humus present in it.

This makes it suitable for growing cereals like wheat, gram and paddy.

Differences between clayey soil and sandy soil are:

 Clayey soil Sandy soil Contains finer particles Contains larger particles Particles are tightly packed Particles are loosely packed It is fertile It is not fertile High water retention capacity Low water retention capacity Lowest percolation rate of water Highest percolation rate of water

The various layers of soil are:

A- horizon or topsoil : Soft, porous and can retain more water.

B- horizon or middle layer: Harder and more compact.

C- horizon or third layer: Made up of small lumps of rocks with cracks and crevices.

Bedrock:  Hard and difficult to dig.

Given,

Time taken to percolate = $40\ min$

Amount of water = $200\ mL$

We know,

Rate of percolation $(mL/min)$$\frac{amount\ of\ water}{percolation\ time}$

$= \frac{200\ ml}{40\ min}$

$= 5\ mL/min$

Therefore, percolation rate of water = $5\ mL/min$

The ways to prevent soil pollution are:

(ii) Limiting the use of pesticides and insecticides.

(iii) Making dumping grounds of non-biodegradable wastes far away from fertile land.

The removal of land surface by water, wind or ice is known as erosion. The ways to prevent soil erosion are:

(i) Afforestation or planting of trees.

(ii) Reduce cutting down of trees or deforestation.

(iii) Using step farming in hilly regions

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. EROSION

5. POLYTHENE

6. CLAY

7. EARTHWORM

Down:

1. WIND

3. WHEAT

4. SANDY

5. PROFILE

If you are facing any issue in understanding the answers of the above questions, then don't worry and again go through that NCERT Book and try to understand all the concepts of every topic and then write the answers of all these questions by your own and then compare them with NCERT solutions for class 7 science chapter 9 soil. You will see that your knowledge, as well as the understanding of these concepts, will increase and you will be able to explain the answers in a better way.

## NCERT Solutions for Class 7 Science – Chapter-wise

 Chapter 1 Solutions of NCERT for class 7 science chapter 1 Nutrition in Plants Chapter 2 CBSE NCERT solutions for class 7 science chapter 2 Nutrition in Animals Chapter 3 NCERT solutions for class 7 science chapter 3 - Fibre to Fabric Chapter 4 Solutions of NCERT for class 7 science chapter 4 - Heat Chapter 5 CBSE NCERT solutions for class 7 science chapter 5 - Acids, Bases and Salts Chapter 6 NCERT solutions for class 7 science chapter 6 - Physical and Chemical Changes Chapter 7 Solutions of NCERT for class 7 science chapter 7 - Weather, Climate and Adaptations of Animals to Climate Chapter 8 CBSE NCERT solutions for class 7 science chapter 8 - Winds, storms and cyclones Chapter 9 NCERT solutions for class 7 science chapter 9 - Soil Chapter 10 Solutions of NCERT for class 7 science chapter 10 - Respiration in Organisms Chapter 11 CBSE NCERT solutions for class 7 science chapter 11 - Transportation in Animals and Plants Chapter 12 NCERT solutions for class 7 science chapter 12 - Reproduction in Plants Chapter 13 Solutions of NCERT for class 7 science chapter 13 - Motion and Time Chapter 14 CBSE NCERT solutions for class 7 science chapter 14 - Electric Current and its Effects Chapter 15 NCERT solutions for class 7 science chapter 15 - Light Chapter 16 Solutions of NCERT for class 7 science chapter 16 - Water: A Precious Resource Chapter 17 CBSE NCERT solutions for class 7 science chapter 17 - Forests: Our Lifeline Chapter 18 CBSE NCERT solutions for class 7 science chapter 17 - Forests: Our Lifeline

## NCERT Solutions for Class 7- Subject Wise

 NCERT Solutions for Class 7 Maths NCERT Solutions for Class 7 Science

## What are the benefits of NCERT solutions for class 7 science chapter 9 soil :

• Solutions for NCERT class 7 science chapter 9 soil will also boost your knowledge.
• NCERT is the base of your learning.
• NCERT solutions for class 7 science chapter 9 soil will also help you to understand all the concepts easily.
• You will get all the answers to this chapter and it will help you to score good marks in your school exam.