3. WHAT IS WATER CYCLE?
The continuous process by which water is distributed
throughout the Earth and its atmosphere. Energy
from the sun causes water to evaporate from oceans
and other bodies of water and from soil surfaces.
Plants and animals also add water vapor to the air by
transpiration. As it rises into the atmosphere, the
water vapor condenses to form clouds. Rain and
other forms of precipitation return water to the Earth,
where it flows into bodies of water and into the
ground, beginning the cycle over again. Also called
hydrologic cycle.
4. EVAPORATION: THE WATER CYCLE
Evaporation is the process
by which water changes
from a liquid to a gas or
vapor.
5. CONDENSATION: THE WATER CYCLE
Condensation is the process by
which water vapor in the air is
changed into liquid water.
:
6. PRECIPITATION: THE WATER CYCLE
Precipitation is water released
from clouds in the form of rain,
freezing rain, sleet, snow, or
hail.
:
7. COLLECTION: THE WATER CYCLE
When water falls back to earth
as precipitation, it may fall back
in the oceans, lakes or rivers or
it may end up on land.
8. WHERE IS IT HAPPENING?The water cycle describes the existence and movement of water on, in,
and above the earth. We experience primary components of the water
cycle everyday we are just unaware of it.
For example, when you get out of a swimming pool on a hot day and
realized a few minute later that you are no longer wet; you are
experiencing evaporation first hand.
Or when you see water bead up on the side of a cold drink on a hot
day your seeing condensation in action.
And when your walking in the rain on a cloudy day you are
experiencing precipitation.
Collection- on the other hand is a little more rare in our society since
we have set up our cities in such a way that redirects water to collect in
9. HOW DOES THE WATER CYCLE AFFECT LIFE
ON EARTH?
Water cycle keeps the planet alive by:
Keeping all plants alive,
All plants keep animals alive by sustaining them with food,
and also by giving them oxygen to breathe.
The water cycle also dictates things like wind, temperature,
storms, topography (erosion)
10. SOME PROBLEM WITH THE WATER CYCLE?
Climate change creates extreme weather patterns, like
drought
• Many places are already having drought, such as California
• Drought and changes in growing seasons will have a major
effect on how and where water is relocated around the world
Humans are altering the water system by:
Damming, ground water extraction, irrigation,
urbanization, deforestation
11. WHAT ARE SOME SOLUTIONS?
• California Governor created a statewide
Mandatory water reduction
Goal: To reduce water usage by 25% statewide.
12. HOW ARE WE CONSERVING?
- Lawns: reduce watering the lawn
- Significant cuts in water use on:
Campus’, Golf courses, Parks, Car washes , etc.
- Companies making it easier for new homes to use portable
water
for irrigation (American Tank Company)
-Rebates for water- efficient appliances (Energy Star)
13. WATER FACTS
• Water scarcity affects every continent and affects 4 out of every 10 people
(World Health Organization)
• Demand in the U.S. has tripled in the past 30 years while the population
has grown only 50% (Goldman Sachs)
• 20% of clean water is lost due to leaks in our pipe systems (EPA)
• Moving and treating water uses 19% of California’s electricity and 30% of
its natural gas (California Energy Commission)
• Water related diseases are the leading cause of child death, killing 4,500
children per day (UNICEF)
• Over 80% of US waterways are contaminated by medications (US Geological
Survey)
15. TOTAL WATER WITHDRAWALS IN 2005
Despite the good intentions behind individual citizens
conserving their water allotment; less than 1% of our
totally water expenditures.
The biggest consumers of our fresh water as seen in these
figures are by far Thermoelectric, Irrigation, and the Public
Supply
16. TOTAL WATER USE, BY CATEGORY OF USE,
2005
Grain-fed beef
production takes
100,000 liters of water
for every kilogram of
food. Raising broiler
chickens takes 3,500
liters of water to make
a kilogram of meat. In
comparison, soybean
production uses 2,000
liters for kilogram of
food produced; rice,
1,912; wheat, 900;
and potatoes, 500
liters.
18. CONSERVATION TIPS
1. Washing Laundry and Dishwashers as full loads
2. Flushing medication into the toilet not only contaminates our water supply but it
also uses three times as much water to flush and sanitize the water were pills are
present because the are so dense in mass and in chemical composition
3. Plant tree’s and other plants that are local to the area and require less water or
could survive by the local minimum rainfall.
4. Take care of our Forest; when forest are cut down, less moisture goes into the
atmosphere and average rainfall declines. This process leads to drought and also
strips the soil of it’s nutrients and sends it down stream.
5. Avoid eating food that require large amounts of water to grow such as almonds,
dairy, and beef.
6. Research ways to make Thermoelectric plants less dependent on our fresh water
resources. This is particularly important because the biggest bulk of our freshwater
goes to Thermoelectric plants (40%)
19. SUMMARY
The water cycle describes the movement of water throughout
Earth's surface, atmosphere, and underground. Water is
constantly moving from one place to another through the
processes of evaporation, condensation, precipitation, and
collection. Water in the water cycle can exist as a solid, liquid,
or gas. The water cycle is very important to life on Earth
