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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

______ is a non-biodegradable material - Science

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प्रश्न

______ is a non-biodegradable material

विकल्प

  • Paper

  • A plastic bottle

  • Cotton cloth

  • Wool

MCQ
रिक्त स्थान भरें

उत्तर

Wool is a non-biodegradable material

shaalaa.com
Animal Fibres: Wool
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Polymer Chemistry - Evaluation [पृष्ठ ६२]

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सामाचीर कलवी Science - Term 3 [English] Class 7 TN Board
अध्याय 3 Polymer Chemistry
Evaluation | Q I. 6. | पृष्ठ ६२

संबंधित प्रश्न

You must be familiar with the following nursery rhymes:

Mary had a little lamb, whose fleece was white as snow

Answer the following:

What is meant by the white fleece of the lamb?


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


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 characteristics of wool? Give any three.


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

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


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?


Wool fibre cannot be obtained from which of the following?


Wool yielding animals bear _________ on their body.


State whether the following statements are 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.


Figure 3.1 shows three rings of circles with letters in them. Some of these letters in each ring can form the name of one wool yielding animal. Find the names of these animals.


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 scouting process during the processing of wool refers to ______.


The process called ______ involves the removal of dried wool.


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