Fibre to Fabric - Worksheets

 CBSE Worksheet-01

Class – VII Science (Fibre to Fabric)

  1. Silkworms feeds on leaves of
    1. Guava
    2. Mulberry
    3. Mango
    4. Banana
  2. The process of removal of fleece from the body of sheep is called
    1. Cleaning
    2. Carding
    3. Shearing
    4. Removal
  3. Silk thread is obtained from
    1. Adult moth
    2. Pupa
    3. Caterpillar
    4. Cocoon
  4. Which one of the following is not an example of natural fibre?
    1. Silk
    2. Rayon
    3. Cotton
    4. Wood
  5. Match the following
    Column AColumn B
    a. Science of rearing silk wormi. Bombyx mori
    b. A type of synthetic fibreii. Cellulose
    c. Mulberry silk mothiii. Carding machine
    d. The substance that gives structure to cottoniv. Sericulture
    e. The machine that combs loose wool into sheetv. Nylon
  6. Fill in the blanks:
    1. Wool and silk are ---------------- fibres.
    2. The best quality of wool is obtained form ---------------.
    3. The silk cocoons are ------------------ to kill the insects inside them.
    4. Silk is natural ---------- fibre.
    5. The thick coat of hair on a sheep’s body is called ------------------.
  7. Name the three animals from which we get wool.
  8. What are cocoon?
  9. What is carding? Why it is necessary?
  10. Make meaningful words from the following jumbled words related to wool and silk.
    1. NCOOCO
    2. YERMBULR
    3. YXBMOB OMIR
    4. EECELF
  11. Silkworms secrete fibre made of
    1. fat
    2. cellulose
    3. protein
    4. nylon
  12. What is meant by the following terms?
    1. Rearing
    2. Shearing
    3. Sericulture

CBSE Worksheet-01
Class – VII Science (Fibre to Fabric)
Answer key

  1. b
  2. c
  3. d
  4. b
  5. (a) – (iv), (b) – (v), (c) – (i), (d) – (ii), (e) – (iii).
    1. Natural
    2. Merino sheep
    3. boiled in water
    4. protein
    5. fleece.
  7. Three animals form which we get wool are
    1. Sheep
    2. Goat
    3. Camel
  8. Cocoons are silk containing silk moth. The body of silk moth is surrounded by silk weaving for their protection. It takes about 6-8 days to make a cocoon.
  9. Carding is the process of combing the loose wool fibres into sheet. It is done by a machine called carding machine.
    1. COCOON
    2. MULBERY
    3. BOMBYX MORI
    4. FLEECE
  11. Protein
    1. Rearing: Rearing means helping someone to grow up.
    2. Shearing: It is the process of removal of fleece along with a thin layer of skin from the body of sheep.
    3. Sericulture: Sericulture refers to the rearing of silkworms to obtain silk.