WATER CYCLE
The Sun heats water in lakes, rivers, seas and oceans.Some of
this water evaporates and changes into water vapour.Water vapour
rises into the sky and forms clouds.Water in the clouds falls down
to the Earth as rain, snow or hail.Most of this water flows into
rivers, and the rivers take it back to the sea.The Sun heats the
water and the water cycle starts again.
Water is constantly moving and changing place and state.
But the Earths water is never lost.
Water in rivers travels to the sea.
Some of the water in the sea then evaporates and forms
clouds.
Later, it rains and the water in the clouds falls down to the
river again.
FROM THE SEA TO THE AIR
The heat from the sun makes water in seas, lakes and rivers
evaporate little by little.
This water vapour rises and forms clouds.
Clouds are made up of tiny water droplets.
FROM THE AIR TO THE EARTH
The water in clouds can fall to earth as rain.
If the temperature is very low, the water in the clouds can
freeze and fall to earth. It falls in the form of snow or hail.
FROM THE EARTH TO THE SEA
Water falling to earth can form rivers, lakes or pools.It also
can be stored as snow on the mountaintops. It can also percolate
through the soil.
Rivers take this water back to the sea. In this way, the water
cycle begins all over again.
