Vidaara.orgClass 7 · Mathematics
CodeVID-M7-WS
Fibres to Fabrics — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
25 × 1 = 25 marks
1.
Cotton fibre is obtained from which part of the cotton plant?
- A.Stem
- B.Roots
- C.Seed hairs (bolls)
- D.Leaves
2.
The process of removing seeds from picked cotton is called:
- A.Retting
- B.Ginning
- C.Weaving
- D.Spinning
3.
Jute fibre is obtained from the plant's:
- A.Seed hairs
- B.Stem
- C.Flowers
- D.Fruit
4.
Cotton is preferred for summer clothing because it is:
- A.Coarse and heavy
- B.Breathable and absorbs sweat
- C.Waterproof
- D.Non-absorbent
5.
Jute is most suitable for making:
- A.Silk sarees
- B.Sacks and ropes
- C.Woollen sweaters
- D.Raincoats
6.
Wool is mainly obtained from the fleece of:
- A.Silkworms
- B.Sheep
- C.Cotton plants
- D.Jute plants
7.
The removal of fleece from a sheep is called:
- A.Reeling
- B.Shearing
- C.Ginning
- D.Retting
8.
Silk fibre is obtained from the:
- A.Stem of a plant
- B.Cocoon of the silkworm
- C.Fleece of a goat
- D.Roots of a tree
9.
The rearing of silkworms to obtain silk is called:
- A.Sericulture
- B.Agriculture
- C.Horticulture
- D.Apiculture
10.
Wool keeps us warm because its fibres:
- A.Reflect all heat
- B.Trap insulating air
- C.Conduct heat well
- D.Absorb water
11.
Most synthetic fibres are made from chemicals obtained from:
- A.Cotton plants
- B.Petroleum
- C.Sheep fleece
- D.Silk cocoons
12.
A material made of many small units joined into long chains is called a:
- A.Polymer
- B.Mixture
- C.Solution
- D.Crystal
13.
Which synthetic fibre is stronger than a steel wire of the same thickness?
- A.Acrylic
- B.Nylon
- C.Rayon
- D.Cotton
14.
Polyester clothes need little ironing because polyester is:
- A.Wrinkle-resistant
- B.Heavy
- C.Absorbent
- D.Brittle
15.
The synthetic fibre that imitates wool is:
- A.Nylon
- B.Polyester
- C.Acrylic
- D.Jute
16.
Rayon is made from the natural raw material:
- A.Petroleum
- B.Wood pulp (cellulose)
- C.Sheep fleece
- D.Silk cocoons
17.
Rayon is classified as a ______ fibre.
- A.Fully natural
- B.Fully synthetic
- C.Semi-synthetic
- D.Animal
18.
Rayon is also commonly called:
- A.Artificial wool
- B.Artificial silk
- C.Artificial cotton
- D.Artificial jute
19.
When heated near a flame, synthetic fibres usually:
- A.Burn to ash
- B.Melt and stick to skin
- C.Stay unchanged
- D.Turn to gas only
20.
Which property tells us how well a fibre soaks up sweat?
- A.Strength
- B.Cost
- C.Moisture absorption
- D.Heat resistance
21.
A fabric made by mixing two or more different fibres is called a:
- A.Pure fibre
- B.Blended fibre
- C.Natural fibre
- D.Single fibre
22.
Terycot is made by blending polyester with:
- A.Wool
- B.Silk
- C.Cotton
- D.Jute
23.
Fibres are blended mainly to:
- A.Increase cost
- B.Combine the best properties of each
- C.Make them weaker
- D.Remove all colour
24.
Woollen clothes should be washed in:
- A.Boiling water
- B.Cold or lukewarm water gently
- C.Strong acid
- D.Hot water roughly
25.
For safety, loose synthetic clothing should NOT be worn while:
- A.Sleeping
- B.Reading
- C.Cooking near a flame
- D.Walking
Answer Key
Section A — Multiple Choice (1 mark each)
- (C) Seed hairs (bolls)
- (B) Ginning
- (B) Stem
- (B) Breathable and absorbs sweat
- (B) Sacks and ropes
- (B) Sheep
- (B) Shearing
- (B) Cocoon of the silkworm
- (A) Sericulture
- (B) Trap insulating air
- (B) Petroleum
- (A) Polymer
- (B) Nylon
- (A) Wrinkle-resistant
- (C) Acrylic
- (B) Wood pulp (cellulose)
- (C) Semi-synthetic
- (B) Artificial silk
- (B) Melt and stick to skin
- (C) Moisture absorption
- (B) Blended fibre
- (C) Cotton
- (B) Combine the best properties of each
- (B) Cold or lukewarm water gently
- (C) Cooking near a flame
Generated by Vidaara.org · Assignment VID-M7-WS · vidaara.org