How is water recycled

2.  Water moves from the Earth’s
surface to the Atmosphere, then
it moves back to the surface.
 Water changes states “forms”
as it moves.
How does water changes?

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Evaporation

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During Evaporation
• Water turns from a liquid to a gas.
• Water moves from rivers and lakes into the
atmosphere in the form of water vapor.

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Liquid to a Gas

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Condensation
•condensation is the processof gas
coolingto form a liquid

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So what is
Condensation?
•Condensation is a process, a change
•It’s the coolingprocess that changes gas into
a liquid
•It is the opposite of evaporation.

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Bathroom mirror
•After a shower your bathroom is filledwith
steam (water vapour)from the hot water.
•Whenit hits the coldglass of the mirror it
turns back to waterand forms tiny droplets
H e l l
o !

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Freezing
•The processof liquidcoolingto form a
solid

10. The Water Cycle

11. 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 important to the existence of life
on our planet.

13. Evaporation
• Heat energy from the sun causes water in
puddles, streams, rivers, seas or lakes to
change from a liquid to a water vapor.
• This is called evaporation.
• The vapor rises into the air and collects.

14. “Evaporation”
The conversion of water from a liquid to a gas
Solar energy drives evaporation of water from the ocean.
The evaporated water changes from a liquid form into
water vapor a gaseous form.

15. Condensation
• Water vapor collects in the sky. As
the it cools the water vapor
condenses into water drops.
• Clouds are formed by condensation.

16. “Condensation”
The transformation of water vapor back into liquid water by cooling
Evaporated water is warmed and rises into the air where
it eventually cools and condenses to form clouds.

17. Precipitation
•Water falls to the earth from
clouds. Mainly as rain, but
sometimes as snow, sleet and
hail.
•This is called precipitation.

18. “Precipitation”
Rain, hail, or snow falling from the clouds
due to the condensation of water
With enough condensed water, you get rain!
When clouds become very heavy with
condensed water, the water is released
in the form of rain, hail, or snow.

19. “Collection” Check the R.P. page 24
The collection of precipitation into rivers, lakes, and oceans.
This completes the water cycle!

21. 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.

23. - Groups of water vapor together form the
clouds.
- There are three types of clouds:
1) Cumulus.
2) Stratus.
3) Cirrus.
Clouds

24. • -Puffy & white clouds
that look like cotton balls.
• -They often have a flat bottom.
• -This kind of clouds produces
precipitation.
• When they get larger and darker on the
bottom, they become
cumulo-nimbus clouds.
(1) Cumulus clouds

25. • -Clouds form in layers.
• -The layers look like sheets or blankets.
• -They are often the lowest clouds in the
sky.
• -Fog is a stratus cloud.
• - Stratus clouds can
form precipitation.
(2) Stratus clouds

26. • -Clouds look thin, wispy or feathery.
• -They are made of tiny bits of ice.
• -Cirrus clouds are usually found very
high in the sky
(3) Cirrus clouds

27. PRECIPITATION
HailRain
Sleet Snow

28. • It's the liquid form of the rain.
Rain

29. • Sometimes rain falls from clouds as liquid
but freezes along the way.
• -The rain turns into flakes of ice.
• -This type of rain is sleet.
Sleet

30. • It is made of ice too.
• -The ice chunks are much larger
than sleet.
• -They are formed inside the tall
clouds of thunderstorm.
• -Some are the size of peas,
some are bigger than baseballs.
Hail

31. • When water vapour reaches a
temperature below 0˚C, it freezes into
snow.
• -Bits of snow collect into a cloud, when
they get too heavy, they fall as snow.
Snow