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Our air contains water vapor. We refer to it as, "Humidity". Warmer air can contain more water vapor than cooler air.

So - let's say you have nice, warm air, and there is high humidity. Then you cool that air. Say, cold air moves into your area and cools that nice, warm air. It is logical to say that the newly-cooled air cannot hold as much water. So, the water leaves the air as water vapor, and becomes little drops of water. Anything near these new little drops attract the drops so that they attach to the nearby material. The places that the cold air touches the warm air, creating rain, is called a , "Squall Line". (This also works when warm, moist air blows into an area that has cooler air.)

Sometimes water vapor high in the air (clouds) is cooled. The little water droplets attach to nearby dust particles in the air. These little drops touch other drops until they are so heavy that they fall fast toward Earth. (The ground). We call this, rain, snow, sleet, or hail.

Other times, leaves, grass, your car windows and paint, and other things attract the little droplets of water, and we can actually see them as they touch other droplets and make bigger drops. This is called, "Dew".

You can also see "Dew" on cold pop cans or bottles, only in that case, the water droplets are called, "Condensation", which is also the real name for rain and dew. The water droplets that form - from rain all the way to pop bottles - is called the "Condensate".

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Q: Why do leaves have dew?
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Related questions

Dew in a sentence?

the dew drops on the leaves look cool.


Were does monkeys get their water?

they get it from leaves and dew


Can dew water the plants?

No, the dew is not enough to get the job done. The roots needs a good drink. Dew only really mists the leaves.


What does dew do?

Dew over time sinks into the leaves of the plant and works to slowly decompose it until it wilts and dies.


What does a wooly bear caterpillar drink?

they drink the dew of leaves


What is the morning dew that is visible on the leaves of plants caused by?

Condensation


Where is dew found?

Typically on any cooling surface in a humid environment. For example, leaves warmed by the sunlight during the day, will collect condensed moisture (dew) as they cool during the evening. When the sun rises and re-heats the leaves, the dew will eventually evaporate.


Do moths drink?

Yes, they sip water or dew from leaves and flower petals.


What happens when raindrops fall on a tree leaves?

The rain falls off or turns into dew


What do silk moths eat and drink?

They eat mulberry leaves and drink water or dew.


How can you collect dew drops?

If you live somewhere where you have humidity, a trip outside early in the morning will lead you to find dew on leaves and grass. You could brush the dew off the leaf into a small bowl or jar. It won't be much liquid.


How is 'dew' formed?

condensationAnswerThe surface of the leaves, car bodies, metal structures etc cools below the dewpoint of the air. This occurs in part due to radiative cooling of objects which become cooler than the surrounding air. Note that some "dew" on leaves is actually guttation, or exudation of water from the leaves themselves.