Olympiad Science - Soil
Exam Duration: 45 Mins Total Questions : 30
Which of these is a part of soil that is most helpful to the growth of plants?
- (a)
Humus
- (b)
Sand
- (c)
Clay
- (d)
Small porous rocks
Which of these are present in the soil and required for the growth of crops?
- (a)
Chemicals
- (b)
Pesticides
- (c)
Fertilisers
- (d)
Mineral nutrients
Which of the following sequences show the correct arrangement of different layers of the soil?
- (a)
- (b)
- (c)
- (d)
Fungi and bacteria grow mostly in which layer of soil?
- (a)
Subsoil
- (b)
Top soil
- (c)
Bed rock
- (d)
All the above
Which of the following worms live in the soil?
- (a)
Ringworm
- (b)
Flatworm
- (c)
Earthworm
- (d)
Silkworm
Which of the following helps in soil formation?
- (a)
Formation of rocks
- (b)
Arrangement of layers of sand
- (c)
Breaking down of rocks
- (d)
Arrangement of rocks.
Which of the following is also called soil profile?
- (a)
Composition of the soil
- (b)
Texture of the soil.
- (c)
Layers of the soil
- (d)
Moisture content in the soil
Which layer of soil provides shelter for many living organisms?
- (a)
A-Horizon
- (b)
B-Horizon
- (c)
C-Horizon
- (d)
Mineral
Which of these soils are rich in nutrients and makes the soil fertile?
- (a)
Gravel
- (b)
Humus
- (c)
Clay
- (d)
Loam
Which soil is good at retaining water?
- (a)
Sand and Clayey soil
- (b)
Loamy and Sandy soil
- (c)
Loamy and Clayey soil
- (d)
All of these
Which soil is suitable for growing cereals like wheat and gram?
- (a)
Clayey and loamy
- (b)
Sandy and clayey
- (c)
Sandy and loamy
- (d)
Silt and sandy
Which of the following soil drain water easily?
- (a)
Clayey soil
- (b)
Sandy soil
- (c)
Loamy soil
- (d)
All of these
Which crop is grown in black soil?
- (a)
Wheat
- (b)
Gram
- (c)
Paddy
- (d)
Cotton
Which soil is used to make surahi and matki?
- (a)
Sandy soil
- (b)
Loamy soil
- (c)
Clayey soil
- (d)
Silt
Which soil is rich in humus?
- (a)
Sandy soil
- (b)
Loamy soil
- (c)
Clayey soil
- (d)
Both (A) and (B
In which of the following processes land surface is removed by water, wind or ice?
- (a)
Soil seepage
- (b)
Soil sewage
- (c)
Soil erosion
- (d)
Soil weathering
Which of the following prevents soil erosion?
- (a)
Animals
- (b)
Rocks
- (c)
Plants
- (d)
Mountains
Which of the following soils is well aerated?
- (a)
Sandy soil
- (b)
Clayey soil
- (c)
Silt soil
- (d)
Loamy soil
Which of the following are the constituents of soil?
- (a)
Air and water only
- (b)
Water and plants only.
- (c)
Minerals, organic matter, air and water.
- (d)
Water, air and plants only
Which of the following organisms makes the soil porous?
- (a)
Centipedes
- (b)
Millepedes
- (c)
Beetles
- (d)
Earthworms
What is the collective name for layers of soil?
- (a)
Sedimentation
- (b)
Weathering
- (c)
Erosion
- (d)
Soil profile
Which type of soil is formed by the deposition of silts on river belts, which contains plenty of humus and best suited for growing wheat and rice?
- (a)
Clayey
- (b)
Silt
- (c)
Sandy
- (d)
Sandy and Silt
Which of the following regulate soil formation?
- (a)
Rainfall
- (b)
Temperature
- (c)
Wind
- (d)
All of the above
Based on the given information, which statement is true about the importance of soil to plants?
(i) Soil supplies plants with food
(ii) Soil supplies plants with minerals
(iii) Soil supplies plants with air and water
- (a)
(i) only
- (b)
(ii) and (iii) only
- (c)
(i) and (ii) only
- (d)
(i), (ii) and (i)
Which of the following are considered as "natural tillers of the soil"?
- (a)
Earthworms
- (b)
Canis lupus
- (c)
Apis indica
- (d)
Roundworms
Study the given characteristics and identify the type of soil.
(i) Particles are large and has large spaces between them
(ii) Soil tend to be light, well aerated and rather dry
- (a)
Clayey soil
- (b)
Sandy soil
- (c)
Loamy soil
- (d)
Silt
What conclusion can be made from the given information ? Soil contains air, water, minerals and organic matter.
- (a)
Soil can support plant and animal life
- (b)
Soil cannot support life
- (c)
Soil can support only plant life
- (d)
Soil can support only animal life.
Which of the following is/are the benefits of organic farming?
(i) It does not pollute the environment
(ii) It is easily available
(iii) It enriches the soil with microbial growth
- (a)
(i) only
- (b)
(ii) only
- (c)
(ii) and (iii) only
- (d)
(i), (ii) and (iii)
Which soil tend to be light and well aerated?
- (a)
Clayey soil
- (b)
Sandy soil
- (c)
Loamy soil
- (d)
Silt soil
The given formula \(\frac { amountofwater(ML) }{ time\quad in\quad (min) } \) is used to calculate which of the following processes ?
- (a)
Humidity
- (b)
Percolation rate
- (c)
Climate
- (d)
Evaporation