Q34. How is
Ans. Wool is the fibre
obtained from the fleece of sheep, goat, rabbit, yak and camels. Hair of these
animals is sheared to get wool fibres.
jute fibres are not used for making cloth?
Ans. Jute fibres are not
used for making cloth because they are coarse and rough. Thus are not suitable
for our body.
synthetic fibres are more durable than natural fibres?
Ans. Synthetic fibres are
more durable than natural fibres because they are made up of chemicals.
Q37. One day
Dia saw sweeper burning two heaps of garbage: one of waste paper and another of
old discarded linen clothes. She observed that both heaps produced similar odor
on burning and turned into greyish ash. Why?
Ans. This happened because
both paper and linen are natural plant fibers. They are made up of cellulose.
Q38. Can we
use synthetic fibre for making kitchen towel?
Ans. No, we cannot use synthetic
fibre for making kitchen towel because synthetic fibres melt on heating.
Q39. How did
people cover their bodies before clothes were invented?
Ans. People use to cover
their bodies before clothes were invented by using fur, leather, leaves and
cotton clothes are normally preferred in India?
Ans. The climate of India
is hot and humid. Cotton clothes absorb sweat easily. Hence, people in India
prefer to wear cotton clothes.
synthetic clothes are normally not preferred in hot and humid climate?
Ans. Synthetic fibers such
as nylon and polyester do not absorb sweat. Hence, synthetic clothes are
normally not preferred in hot and humid climate.
don’t we prefer to wear nylon clothes on hot summer day?
Ans. We sweat a lot in
summer. Nylon cloths absorb less water and are not good for our skin. That is
why we do not prefer nylon cloth on hot summer day.
yarn is made from fibre? Explain.
Ans. The process of making
yarn from fibre is called spinning. The fibres are first drawn out from cotton
bolls and then twisted into yarn. Takli and charkha are used in spinning.
Q44. Why we
wear different type of cloths in different seasons?
Ans. We wear different
types of cloths in different seasons in order to adjust with the changing
atmospheric conditions due to change in seasons. For example we wear cotton
clothes in summer as they absorb sweat and woolen in winter season as they do
not allows heat to escape to the cold surrounding.