Download Clouds!! - KelseyVoy-Integrated-Technology-Unit

Clouds
What Are Clouds?
A cloud is a large collection of very tiny
droplets water and ice crystals. The
droplets and crystals are so small and
light that they can float in the air.
How are Clouds Formed?
All air contains water. Sometimes the water in
the air is invisible gas called water vapour.
Cool air can't hold as much water vapour as
warm air. The vapour in cool air condenses
onto tiny pieces of dust floating in the air and
forms a tiny water droplet. When millions of
water droplets come together they become a
cloud.
1. Warm air from the ground rises
2. Cool air from high in the
atmosphere falls
3. The warm air reaches cool air in the
atmosphere
4. The moisture in the warm air
condenses and forms water droplets
and ice crystals
5. Light from the sun cannot pass
easily through the water droplets and
ice crystals and we see clouds!
Why are Clouds white?
Clouds are white because they reflect the light
of the sun. Light is made up of colors of the
rainbow and when you add them all together
you get white.
Why do clouds turn gray?
Clouds are made up of a mixture of water droplets
and ice crystals. The water and ice scatter all
light, and that makes clouds appear white. If the
clouds become very thick, or rise very high in
the sky, the light cannot pass through easily
making the clouds seem gray.
Why do clouds float?
A cloud is made of liquid water droplets and ice
crystals. When air is heated by the sun it rises
and this warm air contains water vapour. As
it rises, it cools, and the water vapour
condenses into water droplets and ice
crystals, forming a cloud. As long as the cloud
and the air that its made of is warmer than
the air around it, it will float.
How do clouds move?
Clouds move with the wind. Clouds that are
very high in the atmosphere are pushed
along by the jet stream, sometimes traveling
at more than 160 Km per hour