MCQ Questions for Class 7 Science Chapter 9 Soil with Answers

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All questions answers in the last paragraph

Q1. The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.

(A) Desert
(B) Forest
(C) Open field
(D) Cricket ground

Q2. Humus refers to the:

(A) top most layer
(B) bottom layer
(C) rotting dead matter in soil
(D) None of these

Q3. A vertical section through different layers of the soil is:

(A) horizons
(B) soil profile
(C) both (A) and (B)
(D) none of these

Q4. The proportion of sand, silt and clay in a soil sample determines

(A) structure
(B) texture
(C) nutrient potential
(D) fertility level

Q5. Soil best suited for cultivation of wheat, rice and sugarcane is

(A) Alluvial soil
(B) Laterite soil
(C) Mountain soil
(D) None of these

Q6. _ 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

Q7. 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 are involved in the formation of soil

Q8. The rotten dead matter in the soil is called:

(A) organic matter
(B) sand
(C) humus
(D) silt

Q9. A well-developed soil profile is the result of:

(A) physical process
(B) chemical process
(C) organic process
(D) All of the above

Q10. In which horizon of soil minerals are found?

(A) A
(B) B
(C) C
(D) None of these

Q11. Soil is polluted by:

(A) air
(B) water
(C) polythene bags
(D) none of these

Q12. Which factor influences soil formation?

(A) Climate
(B) Vegetation
(C) Parent rock
(D) All of these

Q13. The topmost soil:

(A) is soft
(B) is a porous layer
(C) can retain more water
(D) All of the above

Q14. 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

Q15. Which of the following type of soil will form a colloidal solution when suspended in water?

(A) Clay
(B) Silt
(C) Sand
(D) Gravel

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