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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

What are the characteristics of wool? Give any three. - Science

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प्रश्न

What are the characteristics of wool? Give any three.

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उत्तर

  1. It is resistant to heat, water, wear and tear.
  2. It absorbs moisture.
  3. Wool insulates against cold. So wool is a good insulator.
  4. It does not wrinkle easily.
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Animal Fibres: Wool
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अध्याय 5: Animals in Daily Life - Evaluation [पृष्ठ ९१]

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सामाचीर कलवी Science - Term 3 [English] Class 7 TN Board
अध्याय 5 Animals in Daily Life
Evaluation | Q VII. 1. | पृष्ठ ९१

संबंधित प्रश्न

You must be familiar with the given nursery rhymes

Baa baa black sheep, have you any wool.

Answer the following:

Which parts of the black sheep have wool?


Which of the following does not yield wool?


What is meant by term Shearing ?


Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them

Shearing, __________, sorting, ______________________________


Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.

Down

(D) 1: Thorough washing

2 : Animal fibre

3 : Long thread like structure

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3 : Hatches from egg of moth


______ is a non-biodegradable material.


True or False – If False give the correct answer

Wool is the fibre derived from the silk worm.


True or False – If False give the correct answer

Ahimsa silk is otherwise known as Mulberry silk.


What is shearing?


What are the major steps involved in this wool factory.


Write the uses of the wool.


Assertion: Wool is the fibre derived from the fur of animals.

Reason: Animals like goat, Yak, Alpaca and rabbit yields wool.


Wool yielding animals bear ______ on their body.


State whether the following statement is True or False. If false, correct them.

In the process of obtaining wool from fleece, sorting is done after scouring.


Various steps involved to obtain wool from fleece are given here.

  1. Picking out the burrs
  2. Dyeing in various colours
  3. Shearing
  4. Scouring
  5. Sorting

Write the above steps in the correct sequence in which they are carried out.


A wholesale woollen fibre dealer gets the woollen fibre of different textures sorted for various purposes. Match the items in Column I with the woollen fibre in Column II.

Column I Column II
(a) Pashmina shawl (i) Camel wool
(b) Woollen carpet (ii) Angora wool
(c) Baby blanket (iii) Kashmir goat
(d)  Woollen sweater (iv)  Sheep wool

The process called ______ involves the removal of dried wool.


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