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. What is the water cycle?
The water cycle is the name we give to describe the way water
moves throughout planet Earth. The water cycle has two other
names:
The hydrological cycle
•Water (H2O) is a chemical
compound with a lot of important
use to maintain stability in any
external or internal system within
Earth’s biosphere.
The H2O cycle
4. How does the water move in
a cycle?
The water cycle has seven main parts which is according to the module.
These are the steps the water goes through when it’s moving through the
Earth:
1. Evaporation
2. Transpiration
3. Condensation
4. Precipitation
5. Runoff
6. Percolates
7. Groundwater
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 into the
atmosphere.
Evaporation
6. Transpiration
Transpiration occurs when
plants take up liquid water
from the soil and release
water vapor into the air from
their leaves.
The process of evaporation
from plants is called
transpiration. (In other words,
it’s like plants sweating.)
7. Condensation is the process by which
water vapor in the air is changed into
liquid water; it's the opposite of
evaporation. Condensation is crucial to
the water cycle because it is responsible
for the formation of clouds.
When the vapour gets cold, it gets
transformed back into a liquid form; this
is what makes clouds!
Condensation
8. Precipitation
Precipitation happens when the water
that went up into the sky gets
released. Depending on the
temperature, the water comes down
as liquid or solid.
Rain: when the water comes down as
a liquid.
Snow: when the water comes down
as a solid.
9. Runoff occurs when there is
excessive precipitation, and
the ground is
saturated (cannot absorb any
more water). Rivers and lakes
are results of runoff. There is
some evaporation from runoff
into the atmosphere but for
the most part water in rivers
and lakes returns to the
oceans.
Surface Runoff
10. Percolates (Infiltration)
Water infiltrates the soil by moving through
the surface. Percolation is the movement
of water through the soil itself. Finally, as
the water percolates into the deeper layers
of the soil, it reaches ground water, which
is water below the surface. The upper
surface of this underground water is called
the "water table".
Some of the water
percolates underground
and is called
groundwater.
11. As the water moves through the soil and
rock layers, many of the impurities in the
water are filtered out. This filtering process
helps clean the water.
Groundwater serves as a reservoir of
freshwater that also connects to other
freshwater biomes.
GROUNDWATER
14. The Water Cycle
• Condensation transpiration,
precipitation and all the others are
part of the water cycle, a
complex process that not only
gives us water to drink and
food to eat, but also the
weather patterns that help
grow our crops.
15. • The water cycle is an
extremely important process
because it enables the
availability of water for all
living organisms and regulates
weather patterns on our
planet. If water didn't
naturally recycle itself, we
would run out of clean water,
which is essential to life.
IMPORTANCE OF WATER CYCLE
16. Fun facts!
The water you drink everyday is the
same water that has been around
since the Jurassic Period!
The sun is necessary in the water
cycle: no sun means no evaporation.
Only 2.5% of the world’s water is
freshwater.
17. Water is an integral part
of life on this planet.
