Question

A student studies that the hair in a sheep helps it to survive the cold. Which of these explains how the hair keeps the animal warm?
(a) They trap a lot of air which is a poor conductor of heat
(b) They trap dust particles which is a good conductor of heat
(c) They trap a lot of bacteria which is a poor conductor of heat
(d)They trap water molecules which is a good conductor of heat
3) A student studies that selective breeding is helpful and is practiced in wool industries. Which of these mentions the importance of selective breeding in sheep?
(a) Makes the sheep increase in height
(b) Produce more and better-quality wool
(c) Increase the ability to give birth more often
(d) Makes them feel warmer even after removing wool

4) Which of these explains the process of selective breeding?

(a) Specially chosen parents to give birth to young ones
(b) Medical treatment to young ones for better adaptation
(c) Producing organisms exactly similar to existing organisms
(d) Extracting different types of materials from a single organism

5) Which of these would be the best material for the production of woollen cloth?
(a) Soft under hair as they can be dyed easily
(b) Soft under hair as they have a soft texture
(c) Coarse beard hair as they can be sorted easily
(d) Coarse beard hair as they are available in larger quantity

6) Which of these explains the reason for choosing fine under hair over coarse beard hair for wool?
(a) They are heavier
(b) They are soft and better
(c) They are darker in colour
(d) They are more in quantity

7) Which of these explains the process of scouring?
(a) Straightening of the woollen fibres
(b) Picking out of small fluffy fibres
(c) Separating the hair of different texture
(d) Washing wool to remove dust and dirt

8) Which of these arrangements explains the correct order of processing fibres into wool?
(a)Rolling- Shearing-Dyeing- Scouring- Sorting-Cleaning of burrs
(b) Scouring- Shearing-Cleaning of burrs- Rolling-Dyeing-Sorting
(c) Shearing- Scouring-Sorting-Cleaning of burrs- Dyeing- Rolling
(d) Cleaning of burrs- Rolling-Dyeing- Shearing- Scouring- Sorting


9) A student studies that some people working in wool industries are more likely to have a disease called anthrax. It is most likely to occur to the persons who separate the hair of different textures.Which of these job roles in the wool industry is at most risk?
(a) Scouring
(b) Sorting
(c) Shearing
(d) Rolling

10) Which of these explains an occupational hazard experienced by certain workers in the woollen industry?
(a) Severe pain when biting down or chewing food
(b) Infection by a bacterium causing fatal blood disease
(c) Fatal disease caused by parasite such as mosquitoes
(d) Damaged areas in the hard surface of teeth developing tiny openings

11) Which of these requires silk as a raw material?
(a) Blankets
(b) Jackets
(c) Saris
(d) Shoes

12) A manufacturer wants to weave some fabric for an upcoming festival in the summer using one of the materials given below. Which among the following materials would be most appropriate for the fabric?
(a) Leather
(b) Jute
(c) Silk
(d) Wool

13) What is the silk moth known as just after hatched from the egg?
(a) Caterpillars
(b)Cocoon
(c) Moth
(d) Pupa

Answer 1

Answer:

they have air pockets through which they can trap air

3 b

4a

5b

6b

7c

8dont know exactly but a or b

Answer 2

ANSWER:

3. The selective breeding sheep is Makes them feel warmer even after removing wool.

4.The selective breeding Specially chosen parents to give birth to young ones.

5.The woollen cloth is Coarse beard hair as they are available in larger quantity.

6.Reason choosing fine under hair over coarse beard  They are heavier.

7. The scouring  Straightening of the woollen fibres.

8.The arrangements Shearing- Scouring-Sorting-Cleaning of burrs- Dyeing- Rolling.

9.The student studies that some people working in wool industries is Sorting.

10.The occupational hazard  Infection by a bacterium causing fatal blood disease.

11.The silk raw  Saris.

12.The fabric upcoming festival is Leather.

13.The hatched egg Caterpillars.