Question

Wool is used in making garments used in winter because
A.) Wool is a good conductor of heat
B.) Wool is a bad conductor of heat
C.) Air trapped in between the wool fibers prevent the flow of heat from our cold body to surroundings
D.) Both B and C

Answer 1

Hint:In winters we need to keep our body warm, and for that we need to isolate our body from the cold and harsh winter’s environment. To keep our body warm we need to wear such types of clothes that can protect our body’s heat from getting outside in a cold environment. So that our body’s heat can protect us from cold weather.

Complete Solution:
Wool is the most preferable cloth fiber for winters. Almost all our winter clothes are made up of woolen fabric and the reason behind this is that wool is a bad conductor of heat. We know that woolen fabric has large pores in it while cotton and silk fabric have small pores in it.

The large pores in wool are filled with air and we all know that air is a bad conductor of heat. In this way woolen fabric protects us from outside’s cold harsh weather. While cotton’s clothes have very small pores and hence, they have less air filled in the pores of cotton’s fabric and that’s why cotton is very less preferable for winter’s weather.

Hence, we can conclude that the option (D) is the correct answer because both (B and C) reasons are correct for why we use woolen clothes in winters.

Note:
In winters we use woolen clothes and inner wears because in winters outside temperature reaches below zero degrees and our body temperature remains the same that is around 36 degree Celsius and in order to protect yourself from winter’s cold environment we need such type of clothes that can insulate our body’s heat so that we can keep our body warm.