Transcript 2c. Slides Exercise examples

Fresh water sources
 Rain water (water has been
evaporated into earth's
atmosphere )
• Drinking water
• Water for crops
 Ground water
• Largest source
• Drinking water after desalinated
and refined
 Icy water
• Melting of polar ice caps
• Reduction of ice shelves over
the arctic
• Second largest source
Rain water:
•
Evaporated water becomes fresh
(from fresh or salty sources)
• Most accessible
• Used for drinking and agriculture
Ground water:
• Natural reservoirs found below
Earth’s surface
• Largest fresh water source
• Second Largest water source
• Much of it can’t be consumed
directly; it must be purified
Icecaps:
• Least accessible
• Second largest fresh water source
• Earth’s climate change causes ice in the
Arctic to melt in significant amounts
• Less than two percent of earth’s water
Rainwater
:
•
Important source.
•
Drinking water.
•
Water to feed
crops.
Ground water:
•
Largest source fresh
water on planet.
•
Second largest
source of water
found in the
ocean(salty water).
Ice water:
•
•
Melting point.
Difficult to drink but
possible.
Sources of fresh water
Rain
water
- Become a fresh water
- Supply to drinking water
- Water to feed the crops
Ground water
- Very large source of fresh
water
Ice caps
- Second largest fresh
water
- Difficult to use but
possible
Sources of fresh water
Rainwater:
•Water evaporated into the earth’s
atmosphere.
•Used as drinking water and to
feed crops.
Groundwater:
•Underneath the surface of earth.
•Largest source.
•Only a percentage can be refined.
•Used as drinking water.
Ice:
•Second largest source.
•Difficult for consumption.
Sources of fresh water
- rainwater
Product of water
evaporation
- groundwater
- Largest source of fresh water .
- Second source of water general .
- Ice shelves
- Second largest source
of fresh water .
- Less than 2% of earth’s
water .
Uses:
- drinking water .
- Feeds crops .
Uses:
- drinking water .
- Reduces because the
earth’s climate change .
Water sources
Rainwater
Groundwater
Water cycle :
Produce fresh
water
Largest source
for fresh water
Suitable for
drinking
2nd.largest
sources of
water
Feed crops
Desalinated +
refined
Ice
2nd. Largest
fresh water
sources
Difficult to
drink
but possible
Sea water
Salty, not able
to consume it
by people
Water Sources
Rain water
Ground water
Ice
Important source of
fresh water
-Earth evaporating
production
- Many countries, use
it for drinking and
feed crops
-Largest source of
fresh water
-Second largest
source of water
-it’s underneath the
Earth surface
-Desalinated to use
for drinking
-Second largest
source of fresh
water (less than 2%
of water source)
-Reduction as a
result of melting
because of Earth
climate changes
Sources of Fresh Water
• Rainwater
how does it happen?
usage
• Groundwater (underneath the earth’s surface )
1st source of fresh water
- fresh ( used after desalination and refining )
- salty ( not consumed )
• Ice ( due to climate change )
2nd source of fresh water
<2% of the earth’s water