Dew formation

By Tarra Thomas

Dew is formed because the water vapour in the air  condenses on a warmer surface like a leaf.

The air can only hold so much water. The warmer the air the more water it can hold. The surface of a leaf is a good conductor of heat. Because in the morning the air is cooler than it is at let’s say 12 o’clock in the afternoon, the air can not hold as much water vapour and because leaves are warmer the water condenses(clumps together) before it can evaporate.

Basically, this happens because it’s normally cooler in the early morning  and late afternoon.

However, in a place like Darwin where it never gets below 25 degrees, it is never cool enough for dew to form, we get something called “humidity.” Humidity is when there has been no time for anything to condense so it stays in the air making everything lovely and sticky.

Now you know how dew is formed.