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Published on: 03/09/2019
Fibre to Fabric
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Questions + Answers key
Take MCQ Science Test

1.
Silkworms secrete fibre made of
fat
cellulose
protein
nylon
2.
Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Which of the following would be the right gift for her to buy?
Woollen shawl
Silk scarf
Animal fur cap
Leather jacket
3.
The silkworm is (i) a caterpillar, (ii) a larva.
(i)
(ii)
Both (i) and (ii)
Neither (i) nor (ii)
4.
Write a short note on how first silk industry began in China.
5.
Sheep are herbivores, so which type of feed (or food) is provided by shepherds?
6.
Given below is a sequence of steps in the processing of wool. Which are the missing step? Add them.
Shearing, .... sorting ......, ......,......
7.
Out of scouring or shearing, which process comes first in the production of wool from sheep?
8.
In which part, the wool yielding animals llama and alpaca are found?
9.
Write the name of the animal from which wool for pashmina shawls is obtained.
10.
Ajay's father works in a wool industry. In his line of work, he does the job of sorting the fleece of sheep into fibres of different qualities. Ajay noticed that his father and other workers who were doing the similar kind of jobs faced a number of health problems. Ajay discussed this problem with his friends and he came to know that his father is getting health problems due to the nature of his work. Ajay is worried about his father's health. He advised his father to take care of their health and told him about the occupational hazards.
Now answer the following questions.
(a) What do you mean by occupational hazard?
(b) Name the disease that workers may at risk.
(c) What values are shown by Ajay?
11.
_______ is the largest producer of silk.
12.
The sleeping period of silkworm is _____ hours at intervals of about six days.
13.
Wool dissolves in ____ and _______
14.
Lohi and nali are breeds of ______
15.
Mooga is the strongest variety of wool.
16.
Silk is a natural carbohydrate fibre.
17.
The angora rabbit yields best variety of wool
1.
(c)
protein
2.
(a)
Woollen shawl
3.
(c)
Both (i) and (ii)
4.
According to an old Chinese legend, the empress Si-Iung-Chi was asked by the emperor Huang-ti to find the cause of the damaged leaves of mulberry trees growing in their garden. The empress found white worms eating up mulberry leaves. She also noticed that they were spinning shiny cocoons around them. Accidentally, a cocoon dropped into her cup of tea and a tangle of delicate threads separated from the cocoon. This is how silk was discovered by chance. In this way, the first silk industry began in China.
5.
Sheep are herbivores, and prefer grass and leaves of various trees. Their food also contain a mixture of pulses, corn, jowar, oil cakes (material left after taking out oil from seeds) and minerals.
6.
(i) Shearing
(ii) Scouring,
(iii) Sorting
(iv) Fibre spinning,
(v) Dyeing
(vi) Rolling intp the yarn
7.
The first step is shearing then scouring.
8.
Llama and alpaca are found in South America.
9.
Kashmiri goats.
10.
(a) The risks faced by people working in any industry due to the nature of their work are called occupational hazards.
(b) The people who do the job of sorting, sometimes, get infected by the bacteria called anthrax which cause a deadly blood disease called sorter's disease.
(c) Ajay is very caring, intelligent and sensible boy.
11.
( )
China
12.
( )
24
13.
( )
acids and bases
14.
( )
sheep
15.
(b)
16.
(b)
17.
(a)
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