Fibre to Fabric NCERT CBSE Class 7 Science Chapter 3 Summary Note
Fibre to Fabric * Fibre - Very thin thread. - Thread is prepared from it. - Examples- Cotton, wool etc., * Fleece- Hair on body of animals is called fleece. - It keeps body of animals warm. * Role of fleece - Fleece traps air in it. - Air is poor conductor of heat. - Air doesn't allow heat to lose out. Hence, body of animals remain warm. * Types of fibres - (a) Natural fibres- Cotton, Jute, Silk, Wool. (b) Synthetic or Artificial fibre- Rayon, tericot, Nylon etc., * Types of natural fibres - (a) Plant fibre- Cotton, Jute (b) Animal fibre- Silk, Wool. * Selective breeding- Selection of parents to get special characters in offspring, is called selective breeding. * Rearing - The practice of giving shelter, food and medical care to