about the water cycle
Water is present in nature under
many different and temporary forms. All changes that may affect
water in nature contribute to the water cycle.
( diagram: an example of water
Steps of water cycle
Step 1: Under the influence of Sun and winds, the water from oceans,
(and all the reserves of liquid water in the open air) undergoes a
Note: All trees and plants also produce water vapor (this phenomenon is
Water vapor, invisible to the naked eye, rises into the atmosphere.
3: In contact with a
layer of cold air, water vapor becomes liquid
and forms clouds made of tiny water droplets.
Step 4: Pushed
by the winds, clouds reach the inland.
5: When the
form the clouds
become too heavy
they finally fall and form a rain.
Step 6: Once on the
ground, the water from precipitations may flows or it
can also penetrate the soil (it infiltrates).
Step 7: At high
altitudes, temperatures can become very low. The droplets
that form clouds solidify to form ice crystals.
Step 8: When ice
crystals combine to form heavier snowflakes, they fall
and form some snow.
Step 9: If the snow
falls on mountains high enough it can feed a glacier
or forms a snowpack.
Step 10: Fusion of snow and glaciers gives birth to rivers that may
join a lake.
Step 11: The groundwater fed by rainwater that infiltrates the ground
may spray out at the surface as source that give birth to a river.
Step 12: The rivers flow into other rivers and finally reach a sea or
more about water cycle
Kidszone: the water cycle
explained to kids with worksheet to download.
The water cycle - Water science for school:
The water cycle ( also called hydrologic cycle ) explained with a
beautiful and detailed diagram.
Flash water cycle: animated flash
water cycle that explains vapor, clouds, rain and water storage.
Earthguide - water cycle diagram:
another animated diagram that shows how water moves in nature and its
South east water - water cycle game:
an interactive game to learn different steps of water cycle