Answer:
1. Why do we wear clothes?
We wear clothes to protect our body. Clothes keep us safe from heat, cold, rain, wind, and insect bites
2. How did people cover their bodies before invention of clothes?
Before the invention of clothes, people covered their bodies with the skins of animals in cold weather or with leaves, barks, or grasses in warm weather.
3. What is the difference between fibre and yarn?
Fibres are obtained from natural sources such as cotton, wool etc. Yarn is obtained by braiding different fibres together.
4. Name two fibres that are used to make clothes, and two materials that used to make clothes.
Two fibres that are used to make clothes are cotton and wool. Two materials that are not fibres but are used for making clothes are leather and fur, which are derived from animals.
5. List two uses of jute.
chiefly used to make cloth for wrapping bales of raw cotton
also used to make sacks and coarse cloth.
6. Which properties of synthetic fibres make them useful?
High strength.
Resistance to wrinkling.
Fast drying.
7. In most parts of India pure nylon or polyester clothes are not worn.
The climate of India is described as hot and humid, hence in most parts of India nylon and polyester clothes are not worn because they have less air spaces in them and they do not absorb sweat.
8. Why does jute grow so well in the Sunder-bans area?
Jute grows best in warm, humid climates receiving plenty of rainfall. Jute also requires alluvial soil receiving silt from annual flooding. These conditions are best available in the Sunder-bans region. Hence, jute grows well in the Sunder-bans region.