In winter we wear warm woollen clothes because they have air pockets in between them. The air (an insulator or bad conductor of heat) does not allow the warmth of our body to escape out. Thus, keeping us warm. In summer we wear cotton clothes because it lets air to pass through it and so it keeps us cool.
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Why do we wear woollen clothes in summer?
As wool is a very good insulator and a poor conductor of heat, woolen clothes keep the body warm and protect it from the cold winds. Also, the air trapped between the woolen fibers prevents the flow of heat from the body to the cold surroundings. It also prevents the cold air from coming in contact with the body.
Why do we wear woolen clothes in winter for Class 3?
In winter or in cold places, we wear woolen clothes because they trap the bodies heat to keep us warm.
Why do we wear cotton clothes Class 3?
Cotton material is very powerful water absorber that helps in the absorption of perspiration. As perspiration escapes from our bodies, our bodies lose heat and cools. Cotton clothing keeps us safe from fungus and other harmful microorganisms.
Why do we wear cotton clothes in summer class 2?
Cotton is a highly absorbent fabric and can easily absorb sweat from the skin during the summer. Since they can absorb moisture from the skin immediately, it also saves your body from building up too much liquid.
Why is wool used for winter clothes Class 7?
Wool is used as a winter clothing material because it does not provide a heat-resistant surface. Wool fibers trap air, preventing heat from escaping our bodies and into the cold environment.
How do woollen clothes keep us warm in winter class 7?
Wool is a good conductor of heat. Wool traps heat effectively between its layers. Wool is a bad conductor of heat. Wool produces its own heat from its layers.
How do woollen clothes keep us warm in winter Class 7 short answer?
(a) we wear woolen clothes in winter because woolen clothes have fine pores filled with air. Wool and air are both conductors of heat and thus keeps the body warm.
Why do we wear clothes for Class 6?
Answer: We wear clothes to protect ourselves against the weather such as strong sunlight, extreme cold, heat or rain.
Why do we wear woolen clothes in winter class 9?
a Woolen clothes have fine pores filled with air. Wool and air both are bad conductors of heat. Therefore in winter we wear woolen clothes as they check the conduction of heat from the body to the surroundings and thus keeps the body warm.
Why cotton clothes are preferred in summer class 7?
We wear cotton clothes during summer as cotton absorbs sweat from the body, exposing to the atmosphere for easy evaporation. As we tend to sweat more during summer and cotton fabric absorbs sweat and help body to cool down.
Which clothes do we wear to keep warm class 3rd?
Ans: We wear woolen clothes in winter to keep ourselves and our body warm. 3.
Why should we wear cotton clothes in summer short answer Class 9?
Cotton fabric has a special characteristic that is a good absorber of water helps in absorbing the sweat and exposing it to the atmosphere for easy evaporation. – A Cotton garment gives better air circulation prompting more assimilation of sweat and in this way gives us a cooling impact.
Why we must use cotton clothes in the summer class 6?
We must use cotton clothes in summer because they protect us from the heat of the sun. They absorb sweat and help keep our bodies cool. The pores in cotton clothes allow the free movement of air, which helps cool our bodies.
What type of clothes we wear in summer class 9 Chemistry?
We should wear cotton clothes and light coloured clothes in summers. We sweat a lot in summers. Cotton is a good absorber of water. Thus, it absorbs sweat from our body and exposes the sweat to the atmosphere, making its evaporation faster.
Why should we wear cotton clothes in summer Brainly?
Expert-verified answer
We should wear cotton clothes in summer because during summers we tend to sweat a lot and cotton fabric absorbs this sweat and helps the body to cool down. Cotton clothes provide better air circulation leading to more absorption of sweat and thus gives a cooling effect to us.
What are the uses of wool Class 7?
Uses of Wool
- Woollen clothes.
- Blankets.
- Boots.
- Saddle cloths.
- Horse Rugs.
- Seat covers.
What is the difference between wool and hair Class 7?
ANS – WOOL IS THE HAIR OF THE SHEEP , ILAMA AND SOME OTHER RUMINANTS WHILE HAIR IS A PIGMENTED FILAMENT OF KERATIN WHICH GROWS FROM A FOLLICLE ON THE SKIN OF HUMANS AND OTHER MAMMALS.
What is wool short answer?
Wool is a textile fibr obtained from sheep and some other animals, including cashmere and mohair from goats, qiviut from muskoxen, angora from rabbits, and other types of wool from camelids.
What kind of clothes should we wear in summer and winter Why Class 7?
Answer: Solution: We prefer white clothes in summer because white clothes reflect most of the sun’s heat and absorb very little of the sun’s heat and keeps our body cool. We prefer to wear black or dark coloured clothes in winter as dark clothes absorb most of the sun’s heat and keep our body warm.
How does wool keep us warm short answer?
Thermo-insulation
The answer lies in the crimp of the fibres. Wool is able to react to fluctuations in your body temperature due to tiny pockets of air within the fibres that circulate heat. This means that wool will keep you warm when your body is cold, and cool when it’s hot.