Here we are providing Class 7 Science Objective Chapter – 9 Soil because its very important for Class 6 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 7 Science Objective Chapter – 9 Soil is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 7 Science Objective Chapter – 9 Soil 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 7 Science Objective Chapter – 9 Soil
1.The rotten dead matter in the soil is called:
( A ) organic matter
( B ) sand
( C ) humus
( D ) silt
Ans – ( A )
2.Soil is the substance which makes up the _________ of the earth.
( A ) rock
( B ) layers
( C ) surface
( D ) all of the above
Ans – ( C )
3.Soil is formed from the parent rock material by a very slow and gradual process called:
( A ) processing
( B ) weathering
( C ) breaking
( D ) cutting
Ans – ( B )
4.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
Ans – ( D )
5.The uppermost layer of earth’s crust, in which plants grow is:
( A ) soil
( B ) land
( C ) water
( D ) none of these
Answer – ( B )
6.Which factor influences soil formation?
( A ) Climate
( B ) Vegetation
( C ) Microorganism
( D ) All of these
Ans – ( D )
7.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
Ans – ( A )
8.Which of the following does not cause soil erosion?
( A ) Deforestation
( B ) Terrace farming
( C ) Floods
( D ) Overgrazing
Ans – ( B )
9.Soil is polluted by:
( A ) air
( B ) water
( C ) polythene bags
( D ) none of these
Ans – ( D )
10.Soil conservation measures are mainly aimed at protecting
( A ) plants
( B ) top soil
( C ) sub soil
( D ) soil organisms
Ans – ( B )
11.A vertical section through different layers of the soil is:
( A ) horizons
( B ) soil profile
( C ) both ( A ) and (b)
( D ) none of these
Ans – ( C )
12.In which horizon of soil minerals are found? .
( A ) A
( B ) B
( C ) C
( D ) None
Ans – ( B )
13.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
Ans – ( B )
14.The mixture of rock particles and humus is called
( A ) soil
( B ) weathering
( C ) silt
( D ) gravel
Ans – ( A )
15.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
Ans – ( A )
16.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
Ans – ( B )
17.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
Ans – ( A )
18.Which of the following has smallest size soil particles?
( A ) Gravel
( B ) Silt
( C ) Clay
( D ) Sand
Ans – ( C )
19.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
Ans – ( A )
20.In which of the following humus is present in reasonable amount
( A ) A-horizon
( B ) B-horizon
( C ) C-horizon
( D ) Bedrock
Ans – ( A )
21.Which type of soil retains the highest amount of water ?
( A ) clayey soil
( B ) sandy soil
( C ) loamy soil
( D ) none of these
Ans – ( B )
22.Which of the following cannot prevent soil erosion?
( A ) Reforestation
( B ) Deforestation
( C ) Silviculture
( D ) Plantation
Ans – ( B )
23.Which type of soil retains the least amount of water ?
( A ) sandy soil
( B ) loamy soil
( C ) clayey soil
( D ) none of these
Ans – ( A )
24.The topmost layer of soil is known as
( A ) top soil
( B ) sandy soil
( C ) sub soil
( D ) bed soil
Ans – ( A )
25.Rain water can be percolated by making:
( A ) big holes
( B ) small holes
( C ) tanks
( D ) wells
Ans – ( A )
26.Sandy soils are found in
( A ) hilly areas
( B ) tropical region
( C ) deserts
( D ) polar region
Ans – ( C )
27.Wind, rainfall,’temperature, light and humidity affect the:
( A ) soil
( B ) water
( C ) air
( D ) mountains
Ans – ( B )
28.Less humus and more minerals occur in the
( A ) A-horizon
( B ) B-horizon
( C ) C-horizon
( D ) bedrock
Ans – ( C )
29.Loamy soil is most suitable for planting:
( A ) rice crop
( B ) pulses crop
( C ) cotton crop
( D ) all of these
Ans – ( A )
30.Which of these has the smallest size of particles?
( A ) Sand
( B ) Silt
( C ) Clay
( D ) Gravel
Ans – ( C )
31.The removal of land surface by water, wind or ice is known as:
( A ) soil erosion
( B ) horizons
( C ) humus
( D ) rocks
Ans – ( A )
32.Which type of soil is the best for growing cotton?
( A ) Sandy
( B ) Clayey
( C ) Loamy
( D ) Sandy-loam
Ans – ( D )
33.The hard layer of rocks below the C horizon is called:
( A ) bottom rock
( B ) substratum
( C ) bed rock
( D ) gravel
Ans – ( D )
34.Which of these do not cause weathering?
( A ) Clouds
( B ) Wind
( C ) Flowing water
( D ) Freezing of rainwater
Ans – ( A )
35.Soil carried from else where and deposits them in the:
( A ) substratum
( B ) B horizon
( C ) C horizon
( D ) transported soil
Ans – ( D )
36.Which horizon consists of small lumps of rocks with cracks and crevices?
( A ) A-horizon
( B ) B-horizon
( C ) C-horizon
( D ) None of these
Ans – ( C )
37.Rain water washes off minerals and deposits them in the:
( A ) substratum
( B ) B horizon
( C ) C horizon
( D ) R horizon
Ans – ( D )
38.Water logging can be expected in the soil which is rich in
( A ) sand
( B ) clay
( C ) silt
( D ) humus
Ans – ( B )
39.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
Ans – ( B )
40.Paddy grows best in
( A ) clayey soil
( B ) loamy soil
( C ) sandy soil
( D ) sandy-loam soil
Ans – ( A )
41.The colour of red soil is due to presence of:
( A ) minerals
( B ) iron oxide
( C ) vitamins
( D ) none of these
Ans – ( C )
42.Which of the following factors influences soil formation?
( A ) Climate
( B ) Vegetation
( C ) Parent rock
( D ) All of these
Ans – ( D )
43.Bacteria, fungi, algael and tiny organisms called:
( A ) humus
( B ) protozoans
( C ) biota
( D ) all of these
Ans – ( B )
44.The breaking of rocks by the action of wind, water and climate is called
( A ) soil profile
( B ) humus
( C ) weathering
( D ) water logging
Ans – ( C )
45.The best kind of soil for plant growth is:
( A ) loamy soil
( B ) clayey soil
( C ) sandy soil
( D ) all of these
Ans – ( A )
46.The layer which is soft, porous and can retain more water is
( A ) topsoil
( B ) B-horizon
( C ) C-horizon
( D ) bedrock
Ans – ( A )
47. _ are soils in which more than half of the parent mineral matter is volcanic ash and appear very dark in colour.
( A ) Desert soil
( B ) Volcanic soil
( C ) Alluvial soil
( D ) Clayey soil
Ans – ( B )
48.To improve the capacity to hold water ……………………. is added to the soil:
( A ) rocks
( B ) humus
( C ) gravel
( D ) sand
Ans – ( B )
49. The rotten dead matter in the soil is called:
( A ) organic matter
( B ) sand
( C ) humus
( D ) silt
Ans – ( A )
50.Breaking down of rock to form soil is caused by:
( A ) water
( B ) air
( C ) temperature
( D ) all of these
Ans – ( D )
51. A well-developed soil profile is the result of:
( A ) physical process
( B ) chemical process
( C ) organic process
( D ) All of the above
Ans – ( D )
52.Cause of soil erosion is:
( A ) less rainfall
( B ) excess of vegetation
( C ) lack of vegetation
( D ) plenty of rocks
Ans – ( C )
53. Soil is formed from the parent rock material by a very slow and gradual process called:
( A ) processing
( B ) weathering
( C ) breaking
( D ) cutting
Ans – ( B )
54.Humus is present in:
( A ) bad rock
( B ) gravel
( C ) topsoil
( D ) subsoil
Ans – ( C )
55. Which physical property of soil is important to us?
( A ) Texture
( B ) Water holding capacity
( C ) Both of these
( D ) None of these
Ans – ( C )
56.Humus is made up of:
( A ) inorganic matter
( B ) loose soil
( B ) sub soil
( C ) gravel
( D ) bad rock
Ans – ( C )
57. Of the four distinct layers or sections of soil profile, organic matter is found in:
( A ) top soil
( B ) second layer from the top
( C ) third layer from the top
( D ) the bottom layer
Ans – ( A )
58.Fertility of soil is increased by the presence of:
( A ) bacteria
( B ) fungi
( C ) insects
( D ) all of these
Ans – ( A )
59. Which of the following type of soil will form a colloidal solution when suspended in water?
( A ) Clay
( B ) Silt
( C ) Sand
( D ) Gravel
Ans – ( A )
60.aerates the soil and allows the air to reach the roots of plants:
( A ) earthworm
( B ) becteria
( C ) fungi
( D ) virus
Ans – ( D )
