Class-3 Science Chapter-3 Soil

EVENTS CONVENT HIGH SCHOOL

16/01/2021                         CLASS-3                                  SLOT-2

SCIENCE

Chapter-3 SOIL

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A.Fill in the blanks:-

1. Sand soil holds the least water.

2. Clay soil hold the most water.

3.loam is a mixture of sand and clay with humus.

4. Plants grow salinity in soil having minerals salts.

5. If plants do not grow well and add fertilizers to the soil.

B. Tick the (✔️)correct option

1.Soil is formed by the breaking up of.

a rocks(✔️)                      b.stones                 c pebbles

2. Humus is generally

a cherry red                   b.dark brown.(✔️)    c.parrot green.

3. Which care one of the following is a chemical fertilizer?

a.Loam.                         b.Clay.                       c.Urea(✔️)

C. Match the following:

1. Stones.              large particles

2. Sand                  tiny particles

3. Clay                  closely packed 

4. Loam                  sand and clay

D.Answer the following questions:-

1.What is a soil formed?

Ans.1Soil is formed by the breaking up of rocks.

Draw the Foramation of Soil

2.What carries the soil from one place to another?

Ans.2 Melting ice rain and strong wind carries the soil from one place to another.

3. Name the different kinds of soil?

Ans.3 gravel,sand, clay and loam are four kinds of soils.

4. What is humus?

Ans.4 Dead leaves and decayed bodies of animals and plants form the humus.

5. Why does water not pass through play?

Ans.5 water does not pass through clay because they are closely packed.

6. Which is the best soil for growing plants?

Ans.6 loam is the Best soil for growing plants.

7. How do farmers make the soil rich?

Ans.7 farmers make the soil rich by adding enrich fertilizers and also use fresh leaves cow dung and animal waste as manure.