Choose the correct option:
1. Watering the crops is called:
(a) sowing
(b) manuring
(c) tilling
(d) irrigation
2. Weeds are the:
(a) main crop plants
(b) insects and pests
(c) unwanted plants growing along the crop
(d) chemical substances
3. Combines are used for:
(a) sowing of seeds
(b) harvesting the crops
(c) threshing
(d) harvesting and threshing both.
4. Separating grains from chaff is called:
(a) winnowing
(b) threshing
(c) fallow
(d) harvesting.
5. Weedicides are used to destroy:
(a) insects
(b) weeds
(c) pests
(d) none of these.
6. Kharif crops are sown in
(a) March, April
(b) May, June
(c) October, November
(d) Any time.
7. Wheat and gram belong to
(a) Rabi crops
(b) Kharif crops
(c) Both of these
(d) None of these.
8. Examples of kharif crops are
(a) Wheat and maize
(b) Gram and maize
(c) Paddy and maize
(d) All of these.
9. 2-4D is a
(a) Pesticides
(b) Insecticides
(c) Fungicides
(d) Weedicides.
10. Seed drill is used to
(a) sow the seeds
(b) remove the weeds
(c) remove the pest
(d) mix manure in the soil.
11. Spyrogyra is
I. An algae
II. A fungi
III. A protozoa
IV. A bacteria
12. Vaccine for small pox is discorvered by
I. Louis Pasteur
II. Alexander Fleming
III. Edward Jenner
IV. John Mendal
13. Amount of nitrogen in the atmosohere is
I. 58%
II. 68%
III. 78%
IV. 88%
14. Mushroom belongs to
I. Algae
II. Virus
III. Fungi
IV. None of these
15. Amoeba belongs to
I. Algae
II. Fungi
III. Protozoa
IV. Virus
16. Scientist who discovered fermentation is
I. Alexander Fleming
II. Louis Pasteur
III. John Mendal
IV. Edward Jenner
17. Rhizobium becteria
I. Help in digestion
II. Help in nitrogen fixation
III. Cause diseases
IV. All of the above
18. Malaria Is caused by
I. Protozoa
II. Virus
III. Algae
IV. Bacteria
19. Penicillium is a
I. Algae
II. Fungus
III. Bacteria
IV. Yeast
20. Microorganisms are
I. Unicellular
II. Multi-cellular
III. Both
IV. None of these
21. Fabric is made of
(a) steel
(b) fibre
(c) paper
(d) none of these.
22. The small units used in making synthetic fibres are.
(a) molecules
(b) polymers
(c) cells
(d) none of these.
23. The strongest fibre is called:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these.
24. The first man-made fibre is
(a) nylon
(b) polyester
(c) rayon
(d) cotton.
25. The plastics which do not remould again on heating are called:
(a) thermosetting plastics
(b) thermoplast plastics
(c) both of these
(d) none of these.
26. The polyester is made up of
(a) Nylon
(b) Rayon
(c) Esters
(d) Cotton.
27. The nylon is prepared first in. The nylon is prepared first in
(a) 1921
(b) 1931
(c) 1941
(d) 1951.
28. The fibre made up by the chemical treatment of wood pulp is
(a) Rayon
(b) Nylon
(c) Polyester
(d) None of these.
29. A synthetic fibre which works like wool.
(a) Nylon
(b) Polyester
(c) Acrylic
(d) PVC.
30. The raw materials used in making nylon
(a) Wood pulp
(b) Cellulose
(c) Coal, water, air
(d) All of these
II) ___Make a list of agriculture tools with their figure.
III)__ Collect and paste fabrics pieces available at your home and write it's properties with their name.
Answers
Answer:
1) Watering the crop is called irrigation.
2) Weeds are the unwanted plants along growing the crop.
3) Harvesting and threshing both .
4) Separating grains from chaff is called winnowing.
5) Weeds
6) Kharif Crops are down in October - November
7) Rabi Crop
8) Gram and Maize
9) Weedicides
10) Sow the seeds
11) An algae
12) Edward Jenner
13) Earth's atmosphere is 78% nitrogen, 21%
14) Mushrooms instead belong to kingdom Fungi.
15) Amoeba belongs to Protozoa.
16) The scientist who discovered fermentation was Louis Pasteur.
17) Helps in Nitrogen fixation.
18) Malaria is caused by a parasite.
19) Fungus
20) Microorganisms is unicellular organisms.
21) None of these
22) Polymers are small units used to making synthetic fibres .
23) The strongest fibre is called Rayon.
24) the first man made fibre is Nylon.
25) Thermosetting plastic cannot be remoulded after once it was made into some object.
26) Polyester is a synthetic fibre used mostly for making clothes.
27) in 1927.
28) This fibre was called rayon or artificial silk.
29) Acrylic is the name of the synthetic fiber that works like wool.
30) Raw materials used in nylon are petroleum,natural gas.
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Explanation:
watering the crops is called