MCQ Questions for Class 8 Science: Ch 1 Crop Production and Management

MCQ Questions for Class 8 Science: Ch 1 Crop Production and Management

1. Weedicides are used to destroy:
(a) insects
(b) weeds
(c) pests
(d) none of these
► (b) weeds

2. Cutting mature crop manually or by a machine is called:
(a) Irrigating
(b) Harvesting
(c) Breeding
(d) Weeding
► (b) Harvesting

3. Grains are separated from stalks by a process called________
(a) Harvesting
(b) Threshing
(c) Weeding
(d) Winnowing
► (b) Threshing

4. The medium of growth for plants is :
(a) Cell
(b) Soil
(c) Water
(d) Air
► (b) Soil

5. Breeding, rearing and management animals for human use is :
(a) Aniculture
(b) Animal husbandry
(c) Animal culture
(d) None of these
► (b) Animal husbandry

6. The rearing of honey bees on large scale is called:
(a) sericulture
(b) tissue culture
(c) pisciculture
(d) apiculture
► (d) apiculture

7. Any plant cultivated at a large stretch of land is called :
(a) Crop
(b) Weed
(c) Cereal
(d) Fibre
► (a) Crop

8. Watering the crops is called:
(a) sowing
(b) manuring
(c) tilling
(d) irrigation
► (d) irrigation

9. Crop plants may be attacked by pests which affect the crop production. Fungi are such type of pests which cause diseases like
(a) Smut of wheat
(b) Citrus canker
(c) Blight of potato
(d) Both (a) and (c)
► (d) Both (a) and (c)

10. The manure prepared from green plants is :
(a) FYM
(b) Compost
(c) Green manure
(d) all the above
► (c) Green manure

11. Which of the following tools would a farmer use to remove weeds from the field?
(a) Hoe
(b) Axe
(c) Plough
(d) Cultivator
► (a) Hoe

12. Take a beaker and fill half of it with water. Put some wheat seeds in it, stir it and wait for some time. Which of the following holds true regarding the observation and inference of this experiment?
(a) Healthy seeds being lighter float on the surface of water.
(b) Damaged seeds being lighter float on the surface of water.
(c) Some healthy seeds and some damaged seeds float on the surface of water.
(d) Damaged seeds being heavier settle down at the bottom.
► (b) Damaged seeds being lighter float on the surface of water.

13. Combines are used for:
(a) sowing of seeds
(b) harvesting the crops
(c) threshing
(d) harvesting and threshing both
► (d) harvesting and threshing both

14. Peas are rich in:
(a) vitamins
(b) carbohydrates
(c) proteins
(d) fats
► (c) proteins

15. Improper use of fertilizers can cause:
(a) soil alkalinity & soil acidity
(b) soil acidity only
(c) soil acidity and soil erosion
(d) soil erosion
► (a) soil alkalinity & soil acidity

16. The system of irrigation wherein water is supplied drop by drop near the roots of plants, is called
(a) Sprinkler system
(b) Pulley system
(c) Lever system
(d) Drip system
► (d) Drip system

17. Wheat and gram belong to
(a) Rabi crops
(b) Kharif crops
(c) Both of these
(d) None of these
► (a) Rabi crops

18. The agricultural implement used for removing weeds and for loosening soil is :
(a) Combine
(b) Drill
(c) Hoe
(d) Cultivator
► (c) Hoe

19. The cutting and gathering of crop after it is matured is called X. After this, grains are separated from the crop by a process called Y. Z is the process of separating the hay and chaff from the grains. Which of the following statements is/are correct regarding X, Y and Z?
(a) Z is done with the help of wind in which grains along with husk is allowed to fall from a height.
(b) X is done mechanically by combine and manually by plough and harrow.
(c) X is the process known as threshing whereas Y is the process known as winnowing.
(d) Both (a) and (b)
► (a) Z is done with the help of wind in which grains along with husk is allowed to fall from a height.

20. Examples of kharif crops are
(a) Wheat and maize
(b) Gram and maize
(c) Paddy and maize
(d) All of these
► (c) Paddy and maize

21. Seed drill is used to
(a) sow the seeds
(b) remove the weeds
(c) remove the pest
(d) mix manure in the soil
► (a) sow the seeds

22. Cereals provide us mainly :
(a) carbohydrates
(b) proteins
(c) fats
(d) fibre
► (a) carbohydrates

23. Food provides _________ and materials required for the growth and maintenance of our body
(a) energy
(b) nutrition
(c) power
(d) none of the above
► (a) energy

24. Coconut provides us mainly :
(a) fat
(b) milk
(c) protein   
(d) carbohydrate
► (c) protein   
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