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Which option best explains the function of condensation nuclei?

Answer and explanation

Correct answer: They provide tiny surfaces for vapour to form droplets

Condensation nuclei are extremely small particles suspended in the atmosphere, such as dust, salt, smoke, or other aerosols. Water vapour can collect on these particles when air cools and becomes saturated. The particles provide a surface on which tiny liquid droplets can begin to form and grow. In clean air, droplet formation may be more difficult because vapour does not easily begin forming droplets without suitable microscopic surfaces. These nuclei therefore help clouds develop, although they do not control temperature or remove ocean salt.

Option C is correct because condensation nuclei provide tiny surfaces around which water vapour can form droplets. Option A is wrong because nuclei do not always keep temperature constant. Option B is wrong because they do not directly turn rain into ice; freezing depends mainly on temperature and other conditions. Option D is unrelated, since atmospheric particles do not remove salinity from oceans. Their essential role is supporting cloud-droplet formation.

Related tags

GeographyCondensation NucleiCloud Droplets

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