The sun has been warming the ground all morning. The ground warms the air and the temperature rises The warm air rises. As the warm air rises, it cools and the water vapour (tiny droplets of water) in the air condenses to form clouds.
5. The water droplets join together with other water droplets and get heavy. They fall as rain. Types of clouds
Cumulus clouds Cumulus clouds are big and fluffy. They form low in the sky.They bring short, heavy showers of rain.
Stratus clouds Stratus clouds are big blankets of dull cloud. They hang low in the sky and cover the whole sky.They give a light drizzle but not heavy showers.
Cirrus Clouds Cirrus clouds are thin And wispy and are very high up.(More than 6km up). It is freezing up
there so they are made of ice crystals. They can mean that bad weather is on the way. Clouds Clouds are a collection of water droplets or ice
crystals. The warmer the air temperature, the more water vapour (gas) that the air can hold. However, when the air starts to cool, water vapour starts to condense as long as it has condensation nuclei to condense around.
Clouds Exam practise Describe 2 features of a cumulus cloud. (2 marks) One feature is A second feature is
that Cumulus Fairly low clouds with bottom between 600m and 1200m Look like lumps of cotton wool Can produce light rain
Individual clouds have a short life cycle Exam practise Describe 2 features of a cumulonimbus cloud. (2 marks)
Cumulonimbus Large clouds up to 10km high and across.
They resemble giant cauliflower. Produce rain, thunder and lightening Usually found in spring and summer Exam practise Describe 2 features of a Stratus cloud. (2 marks)
Stratus Low level below 2000m and sometimes reaching ground. Usually grey and colour and move fast. Can produce light rain and snow.
Exam practise Describe 2 features of a cirrus cloud. (2 marks) Cirrus Found high in the atmosphere usually over 5,500 metres
Common throughout the world Thin and wispy in appearance Move fairly quickly
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