Notes On Seasons and Clothes - CBSE Class 7 Science
Summer Clothes In hot weather, white or light coloured clothes suit better, because they reflect the heat away and keep the body cool, whereas black clothes retain heat. During summer, clothes made of cotton are preferred as they absorb the sweat and their air spaces allow the circulation of air which helps faster evaporation of the sweat. This keeps the body cool and comfortable. Also loose clothes allow air to circulate below the fabric. Thus, loose clothes are more suited during summer than tight fitting clothes. Hence summer wear should be breathable, light-coloured and loose fitting rather than dark and tight fitting. Winter Clothes In cold weather, dark coloured clothes have to be worn as they are good absorbers of heat. Also woollen garments are suitable for cold weather. As wool is a very good insulator and a poor conductor of heat, woollen clothes keep the body warm and protect it from the cold winds. Also, the air trapped between the woollen fibres 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. Woollen garments have excellent shape retention because of the crimp in the fibres. The crimp creates many tiny air pockets that trap the warm air of the body or form a sort of insulation from the external air. This insulating barrier of air pockets protects the body from cold winds. Sweaters, mufflers, cardigans and woollen garments give protection from cold weather. Thus dark, thick, woollen garments are suitable during winter.

#### Summary

Summer Clothes In hot weather, white or light coloured clothes suit better, because they reflect the heat away and keep the body cool, whereas black clothes retain heat. During summer, clothes made of cotton are preferred as they absorb the sweat and their air spaces allow the circulation of air which helps faster evaporation of the sweat. This keeps the body cool and comfortable. Also loose clothes allow air to circulate below the fabric. Thus, loose clothes are more suited during summer than tight fitting clothes. Hence summer wear should be breathable, light-coloured and loose fitting rather than dark and tight fitting. Winter Clothes In cold weather, dark coloured clothes have to be worn as they are good absorbers of heat. Also woollen garments are suitable for cold weather. As wool is a very good insulator and a poor conductor of heat, woollen clothes keep the body warm and protect it from the cold winds. Also, the air trapped between the woollen fibres 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. Woollen garments have excellent shape retention because of the crimp in the fibres. The crimp creates many tiny air pockets that trap the warm air of the body or form a sort of insulation from the external air. This insulating barrier of air pockets protects the body from cold winds. Sweaters, mufflers, cardigans and woollen garments give protection from cold weather. Thus dark, thick, woollen garments are suitable during winter.

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