4. How are clouds formed?5. List any three human activitiesthat you th

1.	4. How are clouds formed?5. List any three human activitiesthat you think would lead to airpollution.
Answer» 4. During day time, on being heated, a large amount of water evaporates from variouswater bodies and goes into the air. .A part of this water vapour also reaches theatmosphere through biological activities such as transpiration and respiration. .Thiscauses the air in the atmosphere to heat up. When this heated air rises, it expandsand cools, which results in the condensation of water vapour forming water droplets..The presence of dust and other suspended particles in air also facilitates the processof condensation. The formation of water droplets leads to the formation of clouds. 5. .Burning of fossil fuels such as coal and petroleum.Industrialization.Deforestation

4. How are clouds formed?5. List any three human activitiesthat you think would lead to airpollution.

Answer»

4. During day time, on being heated, a large amount of water evaporates from variouswater bodies and goes into the air. .A part of this water vapour also reaches theatmosphere through biological activities such as transpiration and respiration. .Thiscauses the air in the atmosphere to heat up. When this heated air rises, it expandsand cools, which results in the condensation of water vapour forming water droplets..The presence of dust and other suspended particles in air also facilitates the processof condensation. The formation of water droplets leads to the formation of clouds.

5. .Burning of fossil fuels such as coal and petroleum.Industrialization.Deforestation

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