2. Water never leaves the Earth. It is constantly
being cycled through the atmosphere, ocean,
and land. This process, known as the water
cycle , is driven by energy from the sun. The
water cycle is crucial to the existence of life on
our planet.
3. Water Cycle Fun Facts
• Water is essential to our planet’s life and without it nothing
could survive! The globe is two thirds covered by water, but 93% is
ocean water, toxic to humans, plants and animals.
• There is the same amount of water on earth now as there was
when dinosaurs existed a millions of years ago. The water keeps
moving in a cycle; it evaporates from rivers, lakes and ocean. The
vapour from evaporation and condensation forms the clouds in the
sky and then returns to the earth as rain, snow, sleet or hail. The
Earth’s water supply is made up of 97% of oceans, 2% of
icecaps/glaciers, 1% fresh ground water.
• Water is the only thing that can be either a gas/liquid/solid. In
twenty-minutes a thunderstorm can send down over one hundred
twenty-five million gallons of water! The best part about water
cycle is that you can start a diagram/ anything at any stage
because it is always circling around…!
5. During part of the water cycle, the sun heats
up liquid water and changes it to a gas by the
process of evaporation. Water that
evaporates from Earth’s oceans, lakes, rivers,
and moist soil rises up into the atmosphere.
6.
7. The process of evaporation from plants is
called transpiration. (In other words, it’s like
plants sweating.)
8.
9. As water (in the form of gas) rises higher in the
atmosphere, it starts to cool and become a liquid
again. This process is called condensation.
When a large amount of water vapor condenses, it
results in the formation of clouds.
10.
11. When the water in the clouds gets too
heavy, the water falls back to the earth.
This is called precipitation.
12.
13. When rain falls on the land, some of the water is
absorbed into the ground forming pockets of water
called groundwater. Most groundwater eventually
returns to the ocean. Other precipitation runs
directly into streams or rivers. Water that collects
in rivers, streams, and oceans is called runoff.