Page 1 - CBW

SAI International School

Competency Based Worksheet
Subject – Chemistry

Chapter – Soil-A Natural Resource

Class- VII

Q. No. Questions

1. A soil sample has high water retention and is sticky when wet. It is likely to be:
(a) Sandy soil
(b) Loamy soil
(c) Clayey soil
(d) Gravel
2. Which of the following soil types is most suitable for growing lentils and gram (pulses)?
(a) Sandy soil
(b) Clayey soil
(c) Loamy soil
(d) Black soil
3. Which farming technique helps prevent soil erosion on slopes?
(a) Drip irrigation
(b) Shifting cultivation
(c) Terrace farming
(d) Crop rotation
4. Which of the following best explains why loamy soil is preferred for most crops?
(a) It is very dry and loose.
(b) It has very fine particles and cracks easily.
(c) It retains enough water and contains sufficient air.
(d) It lacks humus but absorbs water quickly.
5. A farmer finds that water is draining too quickly from his field, and crops are wilting. Which
type of soil is he likely dealing with?
(a) Clayey soil
(b) Sandy soil
(c) Loamy soil
(d) Black soil
Choose the correct option for the following: (For questions- 6 and 7)
a) If both Assertion and Reason are correct and Reason is the correct explanation of
Assertion.
b) If both Assertion and Reason are correct, but Reason is not the correct explanation of
Assertion.
c) If Assertion is correct but Reason is incorrect.
d) If assertion is incorrect but Reason is correct.
e) If Assertion and Reason both are incorrect.
6. Assertion (A): Soil erosion increases the fertility of the soil.
Reason (R): Soil erosion removes the uppermost layer of fertile soil.
7. Assertion (A): Water logging is more common in sandy soil than in clayey soil.
Reason (R): Clayey soil has low percolation rate and retains more water.