Transcript 115351_Water_Cycle.pptx

Water Cycle

Sun warms ocean water causing it
to EVAPORATE. Water vapor
CONDENSES to form clouds. Clouds
become very heavy before
beginning to PRECIPITATE.
Precipitation collects in rivers, lakes,
and oceans. The sun warms ocean
water…
Draw
Condensation
The movement through plants
The Clouds form
Transpiration
Precipitation
The rain falls
Evaporation
The vapor rises
Source of Energy
??????
Source of Energy

The sun’s energy
is necessary to
power the water
cycle.
Evaporation
Evaporation

The process by which
liquid water is
transformed into a
gaseous state.

The sun warms the
water in the ocean,
causing it to change
from water (liquid) to
water vapor (gas).
Evaporation
More prevalent over the oceans than
precipitation
Most water evaporated from the oceans falls
back into the ocean as precipitation (90%)
The remaining 10% of water evaporated from the
ocean falls over land
Once evaporated, a water molecule spends
about 10 days airborne.
Condensation
Condensation

Once the warm
gas hits the cooler
air it changes
back into a liquid
and forms a cloud.
Precipitation
Precipitation
Tiny water droplets
bounce around in
the cloud. As they
hit each other,
they stick together
and become
larger.
Precipitation

Once they
become so heavy,
the cloud can no
longer hold them.
It begins to
precipitate.
can be:
 Rain
 Freezing
 Snow
 Sleet
 Hail
rain
How many gallons of water
fall when 1 inch of rain falls
on 1 acre of land?
 About
27,154
gallons
Precipitation
collects in…
Rivers
Lakes
Oceans
Transpiration
Transpiration
The process by which
water absorbed by
plants (usually through
the roots) is evaporated
into the atmosphere
from the plant surface
(principally from the
leaves).
Think of it like a plant
sweating….
Then what?
Right! It starts
all over again!
That is why it is
called a
cycle.
Review
Sun warms ocean water causing it to
EVAPORATE. Water vapor
CONDENSES to form clouds. Clouds
become very heavy before
beginning to PRECIPITATE.
Precipitation collects in rivers, lakes,
and oceans. The sun warms ocean
water…
The Water Cycle Movie
Watch the movie
http://glencoe.mcgrawhill.com/sites/dl/free/0078600472/164155/00044678.html
Evaporation Experiment
Materials
1.
2.
3.
4.
2 clear plastic cups
Felt marker
Clear plastic wrap
Water
DIRECTIONS
PARTLY FILL THE PLASTIC CUPS WITH WATER SO
THAT THEY BOTH HAVE THE SAME LEVEL OF WATER.
MARK THE LEVELS WITH THE MARKER. SEAL ONE OF
THE CUPS WITH PLASTIC WRAP. LEAVE IT FOR A
DAY. LOOK AT BOTH CUPS AND MARK WHERE THE
WATER LEVELS ARE. DO THIS FOR A FEW MORE
DAYS, MARKING THE LEVELS EACH DAY AND
NOTING ANY CHANGE. YOUR WILL NOTICE THAT
THE WATER LEVEL GOES DOWN IN THE CUP THAT
HAS NO COVER. WHERE DOES THE WATER GO?
TALK ABOUT THE WATER DISAPPEARING AND
EXPLAIN WHAT EVAPORATION IS.