Class 7 Science Chapter 3 | Fibre to Fabric | Expected Questions

Expected questions from class 7 Science Chapter 3 Fibre to Fabric are given below.

Class 7 Science Chapter 3 | Fibre to Fabric

One mark questions

  1. Name some fibres obtained from animals

Wool and silk

  1. Wool is obtained from the …………………… of sheep or yak.

fleece

  1. From the given options choose the animal from which fleece cannot be obtained – sheep, goat, yak, cow

Cow

  1. The process of selecting parents for obtaining special characters in their offspring is called ……………………………

selective breeding

  1. Pashmina shawls are a famous product of ………………………..

Kashmir

  1. The wool used for making pashmina shawls are obtained from ……………………….

Kashmiri goats

  1. Name the animals from which wool can be obtained

Sheep, yak, goat, angora goats, camels, Llama and Alpaca

  1. Angora goats are found in the hilly regions of ………………………….

Jammu and Kashmir

  1. What is shearing?

Shearing is the process in which the fleece is removed from sheep along with a thin layer of skin.

  1. What is scouring?

Scouring is the process by which the sheared skin with hair is thoroughly washed to remove grease, dust and dirt.

  1. What are burrs?

They are the small fluffy fibers

  1. Name the bacterium which causes sorter’s disease?

Anthrax

  1. Risks faced by people working in any industry are called …………………………….

occupational hazards

  1. The rearing of silk worms for obtaining silk is called ………………………….

sericulture

  1. The larvae of the silk moth is called ………………………….

caterpillars

  1. The fibre obtained from silkworm is made of a …………………….

protein

  1. What is pupa?

When caterpillar is ready to enter the next stage of its life, it begins to weave a net to hold itself. Then it starts secreting fibre made of a kind of protein. This fibre becomes hard when it is exposed to air and is called the silk fibre. The pupa is the caterpillar completely covered in silk fibres.

  1. What is the outer covering of pupa called?
See also  Class 7 Science Chapter 5 Acids, Bases and Salts | One Mark Questions

Cocoon

  1. Which country leads the world in silk production?

China

  1. Name the plant on whose leaves silk worms lay eggs?

Mulberry

  1. The most common silkworm

Mulberry silkworm

  1. What is reeling?

The process of taking out threads from the cocoon for use as silk is called reeling.

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