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Ice crystals require something to start growing on (a nucleus), such a sdirt/dust etc. If the droplet is pure, there is no nucleus to start off the crystallisation process. Hence a drop of water becomes supercooled. Water will spontaneously freeze at -42C (approx) if it lacks the nucleus.

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โˆ™ 2007-09-07 10:48:55
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Q: Why do some water droplets in clouds remain liquid at temperature less than zero degrees?
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Related questions

Clouds in which the water droplets remain liquid below 0 degrees are said to be?

super cooled, D


Choose the statement that is true clouds?

clouds are large quantities of liquid water droplets


Are clouds liquid?

Clouds are water. Water can be found in three forms : solid, liquid and gas. Water as a gas is called water vapour. Clouds form when water vapour turns back into liquid water droplets. That is called condensation. So, clouds are liquid water droplets.


What forms clouds and fog?

Tiny droplets of liquid water


How does water vapor in the air change into liquid droplets forming clouds?

condensation


Are clouds composed of frozen hydrogen molecules?

No, they are large quantities of liquid water droplets.


Why do clouds form before it rains?

Clouds typically form when water vapor in the atmosphere condenses into tiny liquid droplets


Clouds are large quantities of liquid water droplets?

Clouds are large quantities of water vapor. This is the gaseous form of water and is what makes up clouds.


Is cloud a matter?

Liquid and solid. Clouds are formed from tiny droplets of water or ice. Low fluffy clouds are liquid, the high streak clouds are usually solid ice particles. You can see the droplets often when you walk through fog, which is the same as a cloud, but at ground level.


What does a cloud consist of?

Clouds are visible form of moisture. They can be liquid droplets or frozen droplets of water or any other chemical suspended in the atmosphere.


Why do clouds form before rain?

Clouds form when water vapor condenses into tiny liquid droplets. If enough condensation occurs in a cloud then some of the droplets will grow bigger and fall as rain.


The process by which clouds form as water vapor cools and changes into liquid water droplets?

condensation

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