NCERT Solutions for Class 7 Science Chapter 3 Fiber To Fabric

NCERT Solutions for Class 7 Science Chapter 3 Fiber To Fabric

Learn from School Connect Online in this chapter we will learn about Fibres which are very thin, thread-like strands from which fabrics (or cloths) are made. Some examples of fibres are cotton, wool, silk, flax, jute, nylon, polyester and polyacrylic. NCERT Solutions for Class 7 Science Chapter 3 Fiber To Fabric

Download PDF of NCERT Solutions for Class 7 Science   

NCERT Solutions Download Class 7	Chapter Name	NCERT Solutions Download Class 7	Chapter Name
NCERT Solutions For Class 7 Science Chapter 1: Nutrition In Plants	Nutrition in Plants	NCERT Solutions for Class 7 Chapter 10 Respiration in Organisms	Respiration in Organisms
NCERT Solutions for Class 7 Chapter 2 Nutrition in Animals	Nutrition in Animals	NCERT Solutions for Class 7 Chapter 11 Transportation in Animals and Plants	Transportation in Animals and Plants
NCERT Solutions for Class 7 Chapter 3 Fibre to Fabric	Fibre to Fabric	NCERT Solutions for Class 7 Chapter 12 Transportation in Animals and Plants	Reproduction in Plants
NCERT Solutions for Class 7 Chapter 4 Heat	Heat	NCERT Solutions for Class 7 Chapter 13 Motion and Times	Motion and Times
NCERT Solutions for Class 7 Chapter 5 Acids,Bases and Salts	Acids,Bases and Salts	NCERT Solutions for Class 7 Chapter 14 Electric Current and its Effects	Electric Current and its Effects
NCERT Solutions for Class 7 Chapter 6 Physical and Chemical Changes	Physical and Chemical Changes	NCERT Solutions for Class 7 Chapter 15 Light	Light
NCERT Solutions for Class 7 Chapter 7	Weather,Climate and Adaptations of Animals to Climate	NCERT Solutions for Class 7 Chapter 16 Water;A precious resource	Water;A precious resource
NCERT Solutions for Class 7 Chapter 8	Winds Storms and Cyclones	NCERT Solutions for Class 7 Chapter 17 Forests;Our life line	Forests;Our life line
NCERT Solutions for Class 7 Chapter 9	Soil	NCERT Solutions for Class 7 Chapter 18 Waste water story	Waste water story

NCERT SOLUTIONS Chapter 3 Fiber To Fabric

1. You must be familiar with the following nursery rhymes:

(i) ‘Baa baa black sheep, have you any wool.’

(ii) ‘Mary had a little lamb, whose fleece was white as snow.’

Answer the following:

(a) Which parts of the black sheep have wool?

(b) What is meant by the white fleece of the lamb?

Solution:

a) Wool is obtained from hairy fibres of the sheep.

b) White fleece of the lamb refers to the white colour of their fur.

2. The silkworm is (a) a caterpillar, (b) a larva.

Choose the correct option. (i) a (ii) b (iii) both a and b (iv) neither a nor b.

Solution:

(iii) both a and b

3. Which of the following does not yield wool?

(i) Yak (ii) Camel (iii) Goat (iv) Woolly dog

Solution:

The answer is (iv) Woolly dog

4.What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

Solution:

i) Raising domestic animals like sheep, goats, yak, cows and buffaloes for commercial purposes such as for milk and fur is known as rearing.

ii) Shearing is a process of removal of animal hair by using machines similar to those used by barbers.

ii) Rearing of silkworms to get silk is known as Sericulture.

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

Shearing, __________, sorting, __________, __________, _________.

Solution:

Shearing, Scouring, sorting, picking of burrs, dying of fibres, making of yarn.

6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

Solution:

7. Out of the following, which are the two terms related to silk production?

Sericulture, floriculture, moriculture, apiculture and silviculture.

Hints: (i) Silk production involves cultivation of mulberry leaves and rearing silkworms. (ii) Scientific name of mulberry is Morus alba

Solution:

Sericulture and moriculture

8. Match the words of Column I with those given in Column II:

Column-I	Column-I
1. Scouring	(a) Yields silk fibres
2. Mulberry leaves	(b) Wool yielding animal
3. Yak	(c) Food of silkworm
4. Cocoon	(d) Reeling
	(e) Cleaning sheared skin

Solution:

Column-I	Column-I
1. Scouring	(e) Cleaning sheared skin
2. Mulberry leaves	(c) Food of silkworm
3. Yak	(b) Wool yielding animal
4. Cocoon	(a) Yields silk fibres

9. 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 : Animal fibre

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3: Hatches from egg of moth

Solution:

Down:

1D. Scour

2D. Silk

3D. Fibre

Across

1A. Wool

2A. Mulberry

3A. Caterpillar

CBSE Notes for Class 7 Science Free Download for All Chapters

CBSE Class 7 Science Study Notes	CBSE Class 7 Science Study Notes
Nutrition in Plants Class 7 Notes Chapter 1	Respiration in Organisms Class 7 Notes Chapter 10
Nutrition in Animals Class 7 Notes Chapter 2	Transportation in Animals and Plants Class 7 Notes Chapter 11
Fibre to Fabric Class 7 Notes Chapter 3	Reproduction in Plants Class 7 Notes Chapter 12
Heat Class 7 Notes Chapter 4	Motion and Times Class 7 Notes Chapter 13
Acids,Bases and Salts Class 7 Notes Chapter 5	Electric Current and its Effects Class 7 Notes Chapter 14
Physical and Chemical Changes Class 7 Notes Chapter 6	Light Class 7 Notes Chapter 15
Weather,Climate and Adaptations of Animals to Climate Class 7 Notes Chapter 7	Water;A precious resource Class 7 Notes Chapter 16
Winds Storms and Cyclones Class 7 Notes Chapter 8	Forests;Our life line Class 7 Notes Chapter 17
Soil Class 7 Notes Chapter 9	Waste water story Class 7 Notes Chapter 18

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