Tuesday, 20 July 2021

CBSE Class 7 - Science - Soil (Worksheet)(#eduvictors)(#class7Science)

CBSE Class 7 - Science - Soil (Worksheet)

CBSE Class 7 - Science - Soil (Worksheet)(#eduvictors)(#class7Science)
Image Credits: Tomáš Kebert & umimeto.org (wikimedia)


Fill in the blanks with suitable words.


1. Soil is formed by the breaking down of rocks, by the action of wind, water and climate, called __________.


2. The removal of land surface by water, wind or ice is known as ________.


3. ________ soil having organic matter and a good capacity to retain water are ideal sources for growing paddy.


4. A vertical section through different layers of soil is called the ______ _______.


5. ______ soil is made up of a greater proportion of big particles like sand that have large spaces between them. It has a low water retention capacity. It is suitable for cotton crops.


6. _________ are called ‘Farmers' friends’.


7. ______ soil contains approximately the same amount of large and small particles


8. The relative amount of sand and clay depends upon the rock from which the particles were formed, called ______ rock.


9. _______ soil is used to make pots, toys and statues.


10. The middle layer in a soil profile is called _______ that contains a lesser proportion of humus and more minerals.


11. The A-horizon is dark in colour as it is rich in _______ and minerals.


12. The ______, also called the third layer, is made up of small lumps of rocks with cracks and crevices.


13. Water ________ rate of the soil refers to the rate of the movement of water through the soil as it passes through the small holes or spaces between the particles of the soil.


14. Planting of trees called as __________ and prevention of the cutting of trees are two important measures to help control soil erosion.


15. __________ is the lowermost hard layer and difficult to dig with spade.


16. ________ is a partially decomposed organic matter of the soil.



Answers:

1. weathering

2. erosion

3. Clayey

4. soil profile

5. Sandy

6. Earthworms

7. Loamy

8. parent

9. Clayey

10. B-horizon

11. humus

12. C-horizon

13. percolation

14. afforestation

15. Bedrock

16. Humus


👉See Also:

Ch 9 Soil (Q & A)
Ch 9 Soil (MCQs) 

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