Transcript Distribution of water on Earth and how it cycles.

Water Cycle
The Hydrologic Cycle
I’ve got
the
power!
Evaporation
• Heat energy from
the sun causes
water in puddles,
streams, rivers,
seas, oceans or
lakes to change
from a liquid to
water vapor (a
gas).
• This is called
evaporation.
•The vapor
rises into the
air and collects
in clouds.
Transpiration
• Transpiration is the
process by which
plants lose water out
of their leaves.
• Transpiration gives
evaporation a bit of a
hand in getting the
water vapor back up
into the air.
Condensation
• As water vapor
This
is
called
rises and
condensation.
cools, it
collects around
dust particles
(or condenses)
and forms
clouds.
Precipitation
• When clouds are saturated
gravity pulls the water to the
earth. Mainly as rain, but
sometimes as snow, sleet, and
hail.
•This is
called
precipitation.
2 types of Run Off
• Surface run off: movement of
water on Earth’s surface to
collect in rivers, streams,
lakes and oceans.
• Subsurface run off: movement
of water beneath the Earth’s
surface that eventually
collects in aquifers and
springs.
Accumulation
• a.k.a. collection
• Water collects in rivers, lakes,
streams, and the ocean.
Condensation
The Clouds form
The movement through plants
Transpiration
Precipitation
The rain falls
Evaporation
The vapor rises
Accumulation
0.5
Consumable
0.5 Nonconsumable
How is water distributed on the Earth?
97 % of the world’s Water
supply is salt water (seas and
oceans).
 2 % of the world’s water
supply is fresh and frozen in
icecaps and glaciers.

How is water distributed on the Earth?
 0.5 % of the world’s water
supply is non-consumable water
on land, water in atmosphere or
dirty water
 0.5% of the world’s water
supply is freshwater available for
consumption.(lakes, rivers,
streams, groundwater)