NCERT Solutions for Class 7 Science Chapter 9: Soil

NCERT Solutions for Class 7 Science Chapter 9 Soil are provided in this article. Key concepts covered in this chapter are:

• Soil Profile
• Soil Types
• Properties of Soil
• Moisture in Soil
• Absorption of Water by Soil

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

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NCERT Solutions for Class 7 Science Chapter 9

NCERT Solutions for Class 7 Science Chapter 9 Soil are given in the following PDF:

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Class 7 Science Chapter 9 Soil: Important Topics

Soil is a material found on most of the surface of earth comprised of organic matter, minerals, gases, liquids, and organisms that together support life. It is composed of mineral particles, organic materials, air, water, and living organisms—all of which interact slowly yet constantly.

• Soil Profile

Soil profile is referred to as as the vertical section of the soil from the ground surface downwards to where the soil meets the rock. It helps to examine the structure of soil. A soil profile is divided into layers which are known as horizons. The main soil horizons are A, B, C, and D. 

The layers of soil can be identified by the soil colour as well as by the size of soil particles. The different layers of soil are:

• Topsoil
• Subsoil
• Parent rock

• Soil Types

A soil type is referred to as a taxonomic unit in soil science. All soils that share a certain set of well-defined properties form a distinctive soil type. 

Soil is classified into four types:

• Sandy soil
• Silt Soil
• Clay Soil
• Loamy Soil

• Properties of Soil

The physical properties of soil include texture, structure, density, porosity, consistency, temperature, and color.

• Soil texture
• Soil structure
• Soil density
• Soil porosity
• Soil consistency (plasticity)
• Soil temperature

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