We can't drink sea water because it contains salt.


In KS2 geography children will look at the water cycle - evaporation, condensation, precipitation, rivers and seas. Also covered in this topic is the treatment of sewage, drought and flooding.

The liquid that forms seas and lakes is water. Water is lifted from the surface of the Earth by evaporation. It then cools and through condensation forms clouds. These clouds when cooled further release their water as rain, sleet, hail or snow. It then falls back down to Earth and finds its way back to the sea through rivers. This process is called the water cycle. Water is essential to life and without it all animals and plants would die. Seas are made up of saltwater, whereas rivers are mostly freshwater. Water can be solid (ice), liquid (the sea) and gaseous (steam from a boiling kettle). Pure water is tasteless and odourless.

This quiz tests what you know about the water cycle - from evaporation, through condensation and rainfall and then back to the seas and oceans.

What happens to the waste water from our homes?
It runs into rivers
It runs into the sea
It is cleaned at the sewage works
It soaks into the ground
The sewage works removes things like paper, fat, soap and human waste from the water
Why should water be treated before we drink it?
It can carry disease
It tastes better
So the water company can charge us
To make it clear
Many people around the world die from water borne diseases
Why can we NOT drink sea water?
It is dirty
It contains salt
It is needed by fish
It doesn’t taste nice
Salty water can make us very sick
Where is nine tenths of the Earth’s water?
In oceans
In rivers
In reservoirs
In lakes
There are five oceans in the world
Which water issue is NOT a problem that causes death for people around the world?
Hosepipe ban
No clean water to drink
No sanitation
A hoepipe ban is a method we use to preserve water when there is a shortage
Which is NOT an essential use for water?
Watering crops
Filling a paddling pool
Paddling pools are for fun rather than a necessity
What is the process called when water turns into a gas and rises into the sky?
Sunshine and wind can both cause evaporation. That's how wet clothes dry on a washing line - the sun and wind evaporate the water in them
What is the cycle that ensures we do not run out of water?
Washing cycle
Carbon cycle
Water cycle
Life cycle
Water rises as vapour from the sea and the ground and forms as clouds. It then falls again as rain
What is caused by too much rain falling at once?
Dirty water
Floods can cause rivers to burst their banks and cause devastation
What is the process called when the gas cools and forms clouds?
When water vapour cools it forms droplets. The mist formed if you breathe on a mirror or window is condensation
You can find more about this topic by visiting BBC Bitesize - Explore the water cycle

Author:  Amanda Swift

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