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they get bigger because the water droplets are cold and there is also water vapour in the air which is hotand when they meet the water vapour changes back to water droplets which then combine with the water droplets falling from the thunder cloud!!
due to the wind blow of air water fall discontineus form ,due to surface tension and drag forces of air causes as water droplets
they are droplets of water ( the water that drops from clouds are 0.02 mm an average rain drop is 2 mm ) or they are droplets of ice (like hail)
They condense in the time period because of evaporation, therefore trapping the water vapor inside the glass and when there are enough vapor, like a cloud with rain, the water starts to form droplets and fall downward.
rain
condensation
All water droplets in the air is different just like when they fall down.
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Due to the property of surface tension water surface would act as a stretched membrane. So water skaters, mosquitoes could easily walk on the surface. If oil is mixed with water then surface tension would fall and mosquito cannot breed. That is why we sprinkle oil in fine droplets on stagnant water
airRain are water droplets that fall from the sky.If it is very cold, or there are layers of vary cold air that the rain passes through on the way down, the water droplets can become snow or balls of hail.
The surface area to volume ratio of cloud droplets is very high, which results in an extremely slow terminal velocity. Such droplets are easily held aloft even by very weak air currents. Even if the droplets to start to fall, they will evaporate quickly in the unsaturated air below the clouds.
A water drop is a perfect sphere. A sphere is the geometrical shape that has the smallest surface area for its volume. The drop takes this shape because water molecules tend to stick to each other.