We see many stars, some bright and others dim, shining with their own light. Class 6 Science NCERT Chapter 12 Chapter 12 Beyond Earth
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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Air containing water vapor rises in the atmosphere because it is less dense than surrounding dry air. As warm air rises, it cools, allowing water vapor to condense into clouds, influencing weather patterns.
Other examples of cooling effects include sweating, which cools the body through evaporation; the use of ice packs for injuries; and the cooling sensation of menthol in products like toothpaste and cough drops.
Clothes dry slowly on a rainy day due to high humidity levels. The air is saturated with moisture, reducing the rate of evaporation. This prevents water from evaporating efficiently from the fabric, causing slower drying.
If milk is spread out on a plate instead of water, evaporation would occur, but it would be slower. Milk contains fats and proteins that affect evaporation rates compared to pure water.