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Water cycle and saving water
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At what temperature does water boil?
100 degrees Celsius
At what temperature does water freeze?
0 degrees Celsius
Why should you water the garden in the early morning or in the late afternoon?
Because it will reduce evaporation
How many litres of water can you save if you turn of the tap while you brush your teeth?
18 litres
World water day is on
22nd March every year
The water vapour in the air changes from gas to a liquid. What is the process called?
Condensation
The precipitation collects in rivers, lakes and oceans. What is the process called?
Collection
List the steps of the water cycle.
1. Evaporation 2. Condensation 3. Precipitation 4. Collection
What does cloud formation depend on?
Temperature, humidity, pressure
What type of energy controls evaporation and condensation?
The sun producing heat energy.
How is a cloud formed?
By the condensation of water vapour.
The heat from the sun turns water of rivers, lakes and oceans into a gas. What is the process called?
Evaporation
Layers of gas that surround a planet and keep it warm.
Atmosphere
Water that is released from clouds in the sky; includes rain, snow, sleet, hail.
Precipitation
Water in the gaseous state of matter
Water vapour
To turn (change) from a gas into a liquid.
Condense