Soil Class 7 Quiz Question with Answer
Soil Class 7 Quiz Question with Answer. CBSE Class 7 Science Lesson 9 Mock Test.
Multiple choice questions
1) Which among the following is correct statement about soil?
a) It provides anchorage to the plant.
b) Soil is essential for agriculture.
c) It supplies water and nutrients.
d) All the above.
Answer:- d) all the above
Explanation:- Soil is the loose outermost layer present on earth crust. It is most essential for plant growth. Soil provides anchorage to plants and also provides water and nutrients to grow. It plays an essential role in agriculture.
2) Which of the following materials cause soil pollution?
a) polythene bag
b) Herbicides
c) Both a and b
d) none
Answer :- c) both a and b
Explanation: – Soil pollutants cause Soil pollution. Several soil pollutants are plastic polythene bag, herbicides, pesticide, industrial chemical waste, acid rain, etc.
3) The uppermost horizon of soil is of______ color .
a) blue
b) dark
c) White
d) none
Answer: – b) dark
Explanation:- Uppermost horizon is generally dark in color, the presence of humus and minerals make soil look dark so the correct option is b.
4.) Which horizon of soil is uppermost?
a) A-horizon
b) B- horizon
c) C-horizon
d) none
Answer:- a) A- horizon
Explanation: – A-horizon is the uppermost layer of soil while B and C horizon are the next two layers of soil, so the correct option is (A).
5.) Which of the following horizons provide shelter for many living organisms?
a) B-horizon
b) A- horizon
c) C- horizon
d) none
Answer:- b) A-horizon
Explanation: – A – horizon provides shelter for living organisms like worms, rodents, moles, earthworms, etc.
6) A- Horizon is also recognized as ______.
a) Topsoil
b) Bedrock
c) Both a and b
d) None
Answer :- a) Topsoil
Explanation: – It is present at the top of soil so it is called topsoil while other horizons present below A- horizon.
7) Which of the following layer have less humus but more minerals?
a) B- horizon
b) A- horizon
c) C- horizon
d) Bedrock
Answer:- a) B- horizon
Explanation:- B-horizon layer is generally harder and more compact than A-horizon. It has less humus but more minerals.
8) Study of soil is named as ___________.
a) Aerology
b) Pedology
c) Physiology
d) None
Answer:- b) Pedology
Explanation: – Pedology is the study of soil while Aerology is study of atmosphere and physiology is study of functioning of living organisms.
9) Which of the following layer is made up of small lumps of rocks with cracks and cervices?
a) Bedrock
b) C-horizon
c) A – horizon
d) B- horizon
Answer:- b) C- horizon
Explanation: -it is the third layer of soil which is made up of small lumps of rocks with cracks and crevices so the correct is (B).
10) B- horizon is ________ layer of soil
a) First
b) second
c) Third
d) fourth
Answer: – b) second
Explanation: – B- horizon is the second layer of soil, it is present below the A- horizon and above the. C- horizon, so the correct option is (B).
11.) Which soil type has big particles?
a) clayey soil
b) sandy soil
c) loamy soil
d) all the above
Answer: – b ) sandy soil
Explanation: – Sandy soil contains a great proportion of big particles; therefore they cannot fit close together. Water holding capacity of sandy soil is lowest.
12) Which of the following soil has relatively same larger particles and fine particles?
a) sandy soil
b) Loamy soil
c) clayey soil
d) none of above
Answer:- b) loamy soil
Explanation: – Loamy soil has relatively same larger particles and fine particles. Loamy soil is a mixture of sandy, slit and clay soil.
13) Which kind of soil would be most suitable for planting wheat?
a) sandy soil
b) clayey soil
c) Loamy soil
d) All the above
Answer:-b) clayey soil
Explanation:- wheat is grown in clayey soil because it is rich in humus and is very fertile than the others.
14) Which soil is used to make pots?
a) sandy soil
b) clayey soil
c) loamy
d) none of these
Answer:- b) clayey soil
Explanation: – clayey soil is used to make pots because their soil packs tightly together.
15) Water holding capacity is more in which of the following soil?
a) sandy
b) clayey
c) loamy
d) none of these
Answer:- b)clayey
Explanation: – clayey soil contain smaller particle and closely pack together so, the clayey soil has less air, but they are heavy as they hold more water than sandy and loamy soil.
16) Which soil is most suitable for a cotton plant?
a) loamy soil
b) sandy soil
c) clayey soil
d) black soil
Answer: – d) black soil
Explanation: – Black soil is most suitable for cotton crop. Black soil is enriched in organic carbon.
17) What is the unit of mass?
a) Grams
b) kilograms
c) both a and b
d) none
Answer: – c) both a and b
Explanation: – grams and kilograms both are units of mass.
18) Which of the following soil is not well – aerated?
a) silt soil
b) clayey soil
c) sandy soil
d) loamy soil
Answer:- b) clayey soil
Explanation: – clayey soil particles are tightly packed together with little space for air, so clearly soil has less air and is not well – aerated.