CBSE Class 7 Science Soil MCQs Set B

Question: Growth of root in the soil is –
a) Geotropism
b) Phototropism
c) Chemotropism
d) None
Answer: a

Question: Use of pesticides and fertilizers causes –
a) Soil pollution
b) Air pollution
c) Both A & B
d) None of these
Answer: c

Question: Which of the following is an agent of weathering?
a) Water
b) Plant roots
c) Glaciers
d) All
Answer: d

Question: Loam is a mixture of –
a) Sand and clay
b) Sand and silt
c) Clay and silt
d) Clay and gravel
Answer: a

Question: Primary source of energy in an ecosystem is –
a) Sugar stored in plants
b) Heat liberated during respiration
c) Solar energy
d) Heat liberated by fuel burning
Answer: c

Question: Suitability of a soil growing crops depends upon its –
a) Texture
b) Type
c) Colour
d) All of these
Answer: d

Question: Large scale of planting of trees is called –
a) Afforestation
b) Deforestation
c) Soil erosion
d) Soil pollution
Answer: a

Question: Which of the following decompose the organic matter to produce manure ?
a) Protozoa
b) Bacteria & Fungi
c) Only Bacteria
d) Only Fungi
Answer: b

Question: A soil can hold very little water is –
a) Clayey
b) Loamy
c) Sandy
d) Parent rock
Answer: c

Question: Which of the following is an inexhaustible natural resource ?
a) Air
b) Water
c) Coal
d) None of these
Answer: a

Question: Soil is composed of –
a) Mineral + water + air
b) Mineral + organic matter + air
c) Mineral + organic matter + air + water
d) Organic matter + water
Answer: c

Question: The water holding capacity is highest in –
a) Sandy soil
b) Loamy soil
c) Clayey soil
d) Mixture of sandy and loamy soil
Answer: c

Question: Which of the following is rich in humus ?
a) Topsoil
b) Subsoil
c) Bedrock
d) Parent rock
Answer: a

Question: Rock particles of soil is –
a) Gravel
b) Sand
c) Clay
d) Loam
Answer: a

Question: The best soil for healthy growth of plant is –
a) Sandy
b) Clayey
c) Loamy
d) All
Answer: c

Question: Soils differ according to their –
a) Colour
b) Texture
c) Aeration
d) All
Answer: d