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Soil Class 7 MCQs Questions with Answers
Solving the Soil Multiple Choice Questions of Class 7 Science Chapter 9 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Soil Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 9 Science Class 7 and cross-check your answers during preparation.
Question 1.
The rotten dead matter in the soil is called:
(a) organic matter
(b) sand
(c) humus
(d) silt
Answer
(a) organic matter
Clay soil when felt with your hand, will be the smoothest.
Question 2.
Soil is formed from the parent rock material by a very slow and gradual process called:
(a) processing
(b) weathering
(c) breaking
(d) cutting
Answer
(b) weathering
The rotten dead matter in the soil is called sand.
Question 3.
The uppermost layer of earth’s crust, in which plants grow is:
(a) soil
(b) land
(c) water
(d) none of these
Answer
(b) land
Soil is formed from the parent rock material by a gradual process called weathering.
Question 4.
The uses of soil are:
(a) soil gives crop
(b) soil gives support to buildings
(c) toys can be made from soil
(d) all of these
Answer
(a) soil gives crop
The uppermost layer of earth’s crust, in which plants grow is soil.
Question 5.
Soil is polluted by:
(a) air
(b) water
(c) polythene bags
(d) none of these
Answer
(d) none of these
The uses of soil are they gives crop, support to buildings and to make toys.
Question 6.
A vertical section through different layers of the soil is:
(a) horizons
(b) soil profile
(c) both (a) and (b)
(d) none of these
Answer
(c) both (a) and (b)
Soil is polluted by polythene bags
Question 7.
Different layers of the soil differs in feels colours, depth and chemical composition are:
(a) horizons
(b) soil profile
(c) weathering
(d) can’t say
Answer
(b) soil profile
A vertical section through different layers of soil is soil profile.
Question 8.
What kind of soil should be used for making matkas and surahis ?
(a) clayey soil
(b) loamy soil
(c) sandy soil
(d) can’t say
Answer
(a) clayey soil
Different layers of soil differs in feel, colour, depth and chemical composition are horizons.
Question 9.
The forumla used to calculate the rate of percolation is:
(a) percolation rate = amount of water (ml) percolation time (min)
(b) percolation rate = amount of water X percolation time 1
(c) percolation rate = amount of water X percolation time
(d) none of these
Answer
(a) percolation rate = amount of water (ml) percolation time (min)
Clayey soil should be used for making matkas and surahis.
Question 10.
Which type of soil will allow water to reach a well faster and in greater amount ?
(a) clayey soil
(b) sandy soil
(c) loamy soil
(d) none of these
Answer
(a) clayey soil
Percolation rate = amount of water (ml) percolation time (min) Sandy soil allow water to reach a well faster and is greater amount.
Question 11.
Which type of soil retains the highest amount of water ?
(a) clayey soil
(b) sandy soil
(c) loamy soil
(d) none of these
Answer
(b) sandy soil
Clayey soil retains the highest amount of water.
Question 12.
Which type of soil retains the least amount of water ?
(a) sandy soil
(b) loamy soil
(c) clayey soil
(d) none of these
Answer
(a) sandy soil
Sandy soil retains the least amount of water.
Question 13.
Rain water can be percolated by making:
(a) big holes
(b) small holes
(c) tanks
(d) wells
Answer
(a) big holes
Rain water can be percolated by making small holes.
Question 14.
Wind, rainfall,’temperature, light and humidity affect the:
(a) soil
(b) water
(c) air
(d) mountains
Answer
(b) water
Wind, rainfall, temperature, light and humidity affect soil.
Question 15.
Loamy soil is most suitable for planting:
(a) rice crop
(b) pulses crop
(c) cotton crop
(d) all of these
Answer
(a) rice crop
Loamy soil is most suitable for planting rice crop.
Question 16.
The removal of land surface by water, wind or ice is known as:
(a) soil erosion
(b) horizons
(c) humus
(d) rocks
Answer
(a) soil erosion
The removal of land surface by water, wind or ice is known as soil erosion.
Question 17.
The hard layer of rocks below the C horizon is called:
(a) bottom rock
(b) substratum
(c) bed rock
(d) gravel
Answer
(a) bottom rock
The hard layer of rocks below the C-horizon is called gravel.
Question 18.
Soil carried from else where and deposits them in the:
(a) substratum
(b) B horizon
(c) C horizon
(d) transported soil
Answer
(d) transported soil
Soil carried from else where and deposits them in the transported soil.
Question 19.
Rain water washes off minerals and deposits them in the:
(a) substratum
(b) B horizon
(c) C horizon
(d) R horizon
Answer
(d) R horizon
Rainwater washes off minerals and deposits them in the B-horizon.
Question 20.
Which soil is found in the fertile plains of Punjab and Uttar Pradesh ?
(a) red Soil
(b) black soil
(c) alluvial soil
(d) leteritic soil
Answer
(b) black soil
Alluvial soil is found in fertile plains of Punjab and Uttar Pradesh.
Question 21.
The colour of red soil is due to presence of:
(a) minerals
(b) iron oxide
(c) vitamins
(d) none of these
Answer
(c) vitamins
The colour of red soil is due to presence of iron oxide.
Question 22.
Bacteria, fungi, algael and tiny organisms called:
(a) humus
(b) protozoans
(c) biota
(d) all of these
Answer
(b) protozoans
Bacteria, fungi, algael and tiny organisms called protozoans.
Question 23.
The best kind of soil for plant growth is:
(a) loamy soil
(b) clayey soil
(c) sandy soil
(d) all of these
Answer
(a) loamy soil
The best kind of soil is loamy soil.
Question 24.
To improve the capacity to hold water ……………………. is added to the soil:
(a) rocks
(b) humus
(c) gravel
(d) sand
Answer
(b) humus
Humus improve the capacity to hold water.
Question 25.
Breaking down of rock to form soil is caused by:
(a) water
(b) air
(c) temperature
(d) all of these
Answer
(d) all of these
All of these is caused by breaking down of rock.
Question 26.
Cause of soil erosion is:
(a) less rainfall
(b) excess of vegetation
(c) lack of vegetation
(d) plenty of rocks
Answer
(c) lack of vegetation
Cause of soil erosion is lack of vegetation.
Question 27.
Humus is present in:
(a) bad rock
(b) gravel
(c) topsoil
(d) subsoil
Answer
(c) topsoil
Humus is present in top soil.
Question 28.
Humus is made up of:
(a) inorganic matter
(b) loose soil
(b) sub soil
(c) gravel
(d) bad rock
Answer
(c) gravel
Humus is made up of decayed plants and animals.
Question 29.
Fertility of soil is increased by the presence of:
(a) bacteria
(b) fungi
(c) insects
(d) all of these
Answer
(a) bacteria
The layer of soil where plants growth takes place is top soil.
Question 30.
aerates the soil and allows the air to reach the roots of plants:
(a) earthworm
(b) becteria
(c) fungi
(d) virus
Answer
(d) virus
Fertility of soil is increased by presence of all bacteria, fungi and insects.
Question 31.
For growing pulses the soil required is:
(a) sandy
(b) clayey
(c) loamy
(d) all of these
Answer
(a) sandy
Earthworm aerates the soil and allows the air to reach the roots of plants.
Question 32.
In addition to the rock particles, the soil contains:
(a) air and water
(b) water and minerals
(c) minerals, organic matter, air and water
(d) water, air and plants
Answer
(c) minerals, organic matter, air and water
For growing the pulses the soil required is loamy.
Question 33.
The water holding capacity is the highest in:
(a) clayey soil
(b) sandy soil
(c) loamy soil
(d) mixture of sand and loam
Answer
(c) loamy soil
In addition to the rock particles, the soil contains minerals, organic matter, air and water.
Question 34.
The smallest particles of rock form the:
(a) A-horizon
(b) B-horizon
(c) C-horizon
(d) D-horizon
Answer
(a) A-horizon
The water holding capacity is the highest in clayey soil.
Question 35.
Which of these has the smallest size of particles:
(a) sand
(b) clay
(c) silt
(d) gravel
Answer
(a) sand
The smallest particles of rock form the A-horizon.
Question 36.
What kind of soil is best for growing cotton ?
(a) sandy
(b) clayey
(c) loamy
(d) loamy-sandy
Answer
(b) clayey
Clay has the smallest size of particles.
Question 37.
Humus and the smallest particles of rock form the upper layer of soil called:
(a) parent rock
(b) sub soil
(c) top soil
(d) none of these
Answer
(d) none of these
Loamy and sandy soil is best for growing cotton.
Question 38.
Which layer of the soil has most nutrients for plants ?
(a) top soil
(b) subsoil
(c) parent soil
(d) bad rock
Answer
(c) parent soil
Humus and the smallest particles of rock form the upper layer of soil is called top soil.
Question 39.
Which soil has the right water holding capacity for plant growth:
(a) clayey soil
(b) sandy soil
(c) loamy soil
(d) same for all
Answer
(a) clayey soil
Top soil has most nutrients for plants.
Question 40.
Which soil when felt with your hand will be the smoothest:
(a) clay
(b) silt
(c) sand
(d) loam
Answer
(c) sand
Loamy soil has the right water holding capacity for plant growth.
Match the items in column A with column B:
Question 1.
| Column- A | Column- B |
| (a) Garden soil | (i) Brown in colour |
| (b) Soil from the road side | (ii) Sandy |
| (c) Soil from the area where construction is going on | (iii) Blackish in colour |
Answer
| Column- A | Column- B |
| (a) Garden soil | (iii) Blackish in colour |
| (b) Soil from the road side | (i) Brown in colour |
| (c) Soil from the area where construction is going on | (ii) Sandy |
Question 2.
| Column- A | Column- B |
| (a) A home for living organisms | (i) Large particles |
| (b) Upper layer of the soil | (ii) All kinds of soil |
| (c) Sandy soil | (iii) Small particles and packed tight |
| (d) Middle layer of the soil | (iv) Dark in colour |
| (e) Clayey soil | (v) Lesser amount of humus |
Answer
| Column- A | Column- B |
| (a) A home for living organisms | (ii) All kinds of soil |
| (b) Upper layer of the soil | (iv) Dark in colour |
| (c) Sandy soil | (i) Large particles |
| (d) Middle layer of the soil | (v) Lesser amount of humus |
| (e) Clayey soil | (iii) Small particles and packed tight |
State the following statements are True or False:
Question 1.
The best kind of soil for plant growth is sandy soil.
Answer
False
Question 2.
To improve the capacity to hold water humus is added to soil.
Answer
True
Question 3.
Breaking down of rocks to form soil is caused by coal.
Answer
False
Question 4.
Lack of vegetation is cause of soil erosion.
Answer
True
Question 5.
Humus is made of inorganic matter.
Answer
False
Question 6.
Humus is present in top soil.
Answer
True
Question 7.
The layer of soil where plant growth takes place is top soil.
Answer
True
Question 8.
Fertility of soil is increased by the presence of fungi, insects and bacteria.
Answer
True
Question 9.
Virus aerates the soil and allows the air to reach the roots of plants.
Answer
False
Question 10.
Clayey soil is required for growing pulses.
Answer
False
Question 11.
The removal of land surface by water wind as ice is soil erosion.
Answer
True
Question 12.
Loamy soil is most suitable for planting rice crop.
Answer
True
Question 13.
Polythene bags and plastics pollute the soil.
Answer
True
Question 14.
In the presence of plants, soil become loose.
Answer
False
Question 15.
The upper most horizon is generally light in colour at it is rich in humus.
Answer
False
Question 16.
Clayey soil is used to make pots, toys and statues.
Answer
True
Fill in the blanks:
Question 1.
……………………. is the mixture of rock particles and humus.
Answer
soil
Question 2.
……………………. is the rotting dead matter in the soil.
Answer
humus
Question 3.
……………………. is breaking down of use pieces of rock into smaller pieces.
Answer
weathering
Question 4.
……………………. is formed by humus and the smallest particles of rock.
Answer
top soil
Question 5.
……………………. contains the smallest particles and feels very smooth.
Answer
clay
Question 6.
In addition to the rock particles, top soil also has small stones called …………………….
Answer
Answer: (a)
gravel
Question 7.
……………………. has a lot of sand and a little silt and clay.
Answer
sandy soil
Question 8.
……………………. is below the top soil and it contains mostly rock bits and some nutrients.
Answer
B-horizon
Question 9.
……………………. has the largest size particles can easily be seen.
Answer
sand
Question 10.
……………………. is our most important natural resources.
Answer
soil
Question 11.
……………………. is a mixture of sand, silt and clay and also humus in it.
Answer
loam
Question 12.
……………………. soils rich in clay and organic matter.
Answer
paddy
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