Both a. and
B fill in the blanks:
1 Silk and wool are
Natooal products,
2. Pashmina shawls are woven from
wool.
3. The world's finest wool is extracted from
sheep.
4. Selective breeding of sheep involves the cross between an indigenous and an
5. The scientific name of silkworm is
6. The life cycle of silkworm consists of egg, larva,
and silk mot
effect of silk thread gives it a natural shine.
8
is caused by Bacterium anthracis.
7 The
Answers
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1. Introduction
Overview
Objectives
2. Key Concepts
Animal Fibres - Wool and silk
3. Experiments and Experiences
Distinguish between artificial silk and natural silk.
4. Check your understanding
Quiz
5. Did You Know?
Interesting Facts
Classroom Activities
Finish LessonHelp
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Chapter 3 - Fibre to Fabric
Everything Is Everything - II
Animal Fibres - Wool and silk
Wool
Wool comes from sheep, goat, yak and some other animals. These wool-yielding animals bear hair on their body because hair keeps these animals warm and wool is derived from these hairy fibres.
The hairy skin of the sheep has two types of fibres that form its fleece: (i) the coarse beard hair, and (ii) the fine soft under-hair close to the skin.
Some breeds of sheeppossess only fine under-hair. Theirparents are specially chosen to give birthto sheep which have only soft under hair.This process of selecting parentsfor obtaining special characters in theiroffspring, such as soft under hair insheep, is termed ‘selective breeding’.