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Soil Class 7 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
Soil is the substance which makes up the _________ of the earth.
(a) rock
(b) layers
(c) surface
(d) all of the above
Answer
Answer: (c) surface
Question 2.
Which one of the following is a step in the formation of soil?
(a) Earthquakes or volcanic eruptions
(b) Weathering of rocks
(c) Addition of humus
(d) All of these
Answer
Answer: (d) All of these
Question 3.
Which factor influences soil formation?
(a) Climate
(b) Vegetation
(c) Microorganism
(d) All of these
Answer
Answer: (d) All of these
Question 4.
Which of the following does not cause soil erosion?
(a) Deforestation
(b) Terrace farming
(c) Floods
(d) Overgrazing
Answer
Answer: (b) Terrace farming
Question 5.
Soil conservation measures are mainly aimed at protecting
(a) plants
(b) top soil
(c) sub soil
(d) soil organisms
Answer
Answer: (b) top soil
Question 6.
In which horizon of soil minerals are found?
(a) A
(b) B
(c) C
(d) None
Answer
Answer: (b) B
Question 7.
The best top soil for growing plants is
(a) sandy soil
(b) loamy soil
(c) clayey soil
(d) all of these
Answer
Answer: (b) loamy soil
Question 8.
The mixture of rock particles and humus is called
(a) soil
(b) weathering
(c) silt
(d) gravel
Answer
Answer: (a) soil
Question 9.
One of the following is not a type of soil. This one is
(a) loamy soil
(b) silty soil
(c) clayey soil
(d) sandy soil
Answer
Answer: (b) silty soil
Question 10.
Which of the following has smallest size soil particles?
(a) Gravel
(b) Silt
(c) Clay
(d) Sand
Answer
Answer: (c) Clay
Question 11.
Cotton grows well in
(a) black soil
(b) laterite soil
(c) red soil
(d) loamy soil
Answer
Answer: (a) black soil
Question 12.
In which of the following humus is present in reasonable amount?
(a) A-horizon
(b) B-horizon
(c) C-horizon
(d) Bedrock
Answer
Answer: (a) A-horizon
Question 13.
Which of the following cannot prevent soil erosion?
(a) Reforestation
(b) Deforestation
(c) Silviculture
(d) Plantation
Answer
Answer: (b) Deforestation
Question 14.
The topmost layer of soil is known as
(a) top soil
(b) sandy soil
(c) sub soil
(d) bed soil
Answer
Answer: (a) top soil
Question 15.
Sandy soils are found in
(a) hilly areas
(b) tropical region
(c) deserts
(d) polar region
Answer
Answer: (c) deserts
II. Fill in the blanks with suitable word/s.
Question 1.
B-horizon is also known as ……………..
Answer
Answer: sub-soil
Question 2.
…………….. is removed during soil erosion.
Answer
Answer: Top soil
Question 3.
The soil with large amount of fine particles is called …………….. soil.
Answer
Answer: clayey
Question 4.
The soil with a mixture of humus, sand and clay is called …………….. soil.
Answer
Answer: loamy
Question 5.
…………….. soil is fit for cultivation.
Answer
Answer: loamy
Question 6.
Percolate means …………….. or …………….. gradually
Answer
Answer: filter, ooze
Question 7.
Soil …………….. water and also holds it.
Answer
Answer: absorbs
Question 8.
The soil with larger particles in it is called …………….. soil.
Answer
Answer: sandy
Question 9.
…………….. horizon of soil contains very less organic matter.
Answer
Answer: B
Question 10.
Soil is formed by …………….. of rocks.
Answer
Answer: weathering
Question 11.
The upper crust of earth, which is capable of supporting vegetation is called ……………..
Answer
Answer: soil
Question 12.
A vertical section through different layers of the soil is called the ……………..
Answer
Answer: soil profile
Question 13.
…………….. soil has least water holding capacity.
Answer
Answer: Sandy
Question 14.
Accumulation of wastes in the soil generated by human activity which alter the features of soil is called ……………..
Answer
Answer: soil pollution
Question 15.
The dark colour of the top soil is due to the presence of …………….. in it.
Answer
Answer: Humus
III. True or False
Question 1.
Soil can be acidic, alkaline or neutral.
Answer
Answer: True
Question 2.
Upper portion of soil always contain air.
Answer
Answer: True
Question 3.
Capacity to hold water is more in clayey soil.
Answer
Answer: True
Question 4.
Clayey soil is used for making pots.
Answer
Answer: True
Question 5.
Polythene bags and plastics pollute the soil.
Answer
Answer: True
Question 6.
Erosion of soil is more severe in areas with high vegetation.
Answer
Answer: False
Question 7.
Sub soil is rich in humus.
Answer
Answer: False
Question 8.
Size of soil particles is greater than 2.00 mm in gravel.
Answer
Answer: True
Question 9.
The upper crust of the earth, which is capable of supporting vegetation is called soil.
Answer
Answer: True
Question 10.
Wheat, rice, sugarcane are grown in clayey soil.
Answer
Answer: True
Question 11.
Tilling is necessary for replenishment of soil nutrients.
Answer
Answer: True
Question 12.
Deforestation leads to soil erosion.
Answer
Answer: True
Question 13.
The rotting dead matter in the soil is called humus.
Answer
Answer: True
Question 14.
A vertical section through different layers of the soil is called the soil profile.
Answer
Answer: True
Question 15.
Soil is a waste natural resource.
Answer
Answer: False
IV. Match the Following
| Column I | Column II |
| 1. Earthworm | (a) Sand and beaches |
| 2. Garden lizard | (b) Deep, narrow holes in dry soils |
| 3. Crab | (c) Growing of mosses and ferns on rock |
| 4. Rodents | (d) Soil pollution |
| 5. Scorpion | (e) Acid rain |
| 6. Snails and slugs | (f) Surface of soil |
| 7. Plastics and polythene bags | (g) Surface of shaded moist soils |
| 8. Physical weathering | (h) Burrows in soil |
| 9. Chemical weathering | (i) Falling water on rocks |
| 10. Biological weathering | (j) Horizon-A of moist soil |
Answer
Answer:
| Column I | Column II |
| 1. Earthworm | (j) Horizon-A of moist soil |
| 2. Garden lizard | (f) Surface of soil |
| 3. Crab | (a) Sand and beaches |
| 4. Rodents | (h) Burrows in soil |
| 5. Scorpion | (b) Deep, narrow holes in dry soils |
| 6. Snails and slugs | (g) Surface of shaded moist soils |
| 7. Plastics and polythene bags | (d) Soil pollution |
| 8. Physical weathering | (i) Falling water on rocks |
| 9. Chemical weathering | (e) Acid rain |
| 10. Biological weathering | (c) Growing of mosses and ferns on rock |
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