12th November 2019

metoffice
20

What the clouds are made of?

Clouds form when the invisible water vapour in the air condenses into visible water droplets or ice crystals. There is water around us all the time in the form of tiny gas particles, also known as water vapour. There are also tiny particles floating around in the air - such as salt and dust - these are called aerosols.

Likewise, people ask, what is in a water droplet?

Cloud droplets and two raindrops. The tiny cloud droplets are shown here close together but in reality they are on average ~1 mm apart, some 100X their diameter. Surface tension forces keep the droplets fiercely spherical. In all but thunder clouds, the droplets make up less than a millionth of the volume.

How does a water droplet form?

Formation. Water vapor will condense into droplets depending on the temperature. The temperature at which droplets form is called the dew point. When surface temperature drops, eventually reaching the dew point, atmospheric water vapor condenses to form small droplets on the surface.