
v A cloud is a large group of tiny water droplets that we can see in the air.
v Clouds are formed when water on Earth evaporates into the sky and condenses high up in the cooler air.
v Rain, snow, sleet and hail falling from clouds are called precipitation.
v Most clouds form in the troposphere (the lowest part of Earth's atmosphere) but occasionally they are observed as high as the stratosphere or mesosphere.
v Clouds can contain millions of tons of water.
v There are a range of different types of clouds; the main types include stratus, cumulus and cirrus.
v Stratus clouds are flat and featureless, appearing as layered sheets.
v Cumulus clouds are puffy, like cotton floating in the sky.
v Cirrus clouds are thin and wispy, appearing high in the sky.
v There are many variations of these 3 main cloud types including stratocumulus, altostratus, altocumulus, cirrostratus and cirrocumulus.
v Fog is stratus type of cloud that appears very close to the ground.
v Clouds can also be made of other chemicals.
v Other planets in our Solar System have clouds. Venus has thick clouds of sulphur-dioxide
v While Jupiter and Saturn have clouds of ammonia.