Science Class-4 Lesson-7.Soil

Soil is one of the most important

SCIENCE. 96. Soil. 9. Soil is one of the most important Soil is essential for agriculture. Agriculture ... perform some activities to find the.

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Science Class-4 Lesson-7.Soil

Science. Class-4. Lesson-7.Soil. Q1.fill in the blanks. a) Humus is usually found in top soil. b) Dead and decayed parts of plants and.

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Plant and Soil Science is a two semester course that provides students with opportunities to participate in a variety of activities including laboratory and

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NCERT Solutions for class 7 Science Chapter 9 Soil. Exercise Questions. Page number 105 -106. Tick the most suitable answer in questions 1 and 2.

LESSON PLAN

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201_8std4_science.pdf

Science

Class-4

Lesson-7.Soil

Q1.fill in the blanks.

a) Humus is usually found in top soil. b) Dead and decayed parts of plants and animals that are in the top soil constitute humus. c) strong wind is an agent of soil erosion. d) The colour of the subsoil is lighter than the topsoil. e) Soil is formed by the weathering of rocks.

Q2.Define the following.

a) Embankments- walls of rock and stones built along the banks of river to avoid soil erosion. b) Humus- Dead remains of plants and animals that make the soil dark is known as humus. c) Soil erosion- The process of loosing of topsoil,by wind or water is known as soil erosion . d) Soil profile- The sequence of soil layers. e) Soil conservation- Protection of soil from soil erosion.

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