Transcript The Water Cycle and Ozone Depletion

The Water Cycle and
Ozone Depletion
By: Brett Granborg, Tamer Fahel, Benny
McMullen, Christian Ballestrazze, and Haeli
Lomheim
Explanation of Concept
The water cycle:
Step one: Evaporation; when the sun heats up bodies of water and they turn into
steam or vapor and rise up go into the air.
Step two: Condensation; the water vapor that rises from evaporation cools and turns
back into a liquid which forms clouds.
Step three: Precipitation; this occurs when there is too much water in the air and the
clouds cannot hold it anymore. This occurs in many different forms like rain, sleet,
snow, and hail.
Step four: Collection; when the water falls back down it collects in various places.
THEN IT STARTS ALL OVER!
Haeli Lomheim
Explanation of Concept
Ozone depletion:
Ozone depletion is when the ozone layer protecting the
earth slowly dissipates. This is caused mainly by
pollution.
Since the 1970’s the ozone layer has steadily depleted
by 4% and in the poles it has been much more rapid.
Haeli Lomheim
What is a water cycle?
A endless cycle of water where water is turned
into vapor, a solid, and liquid.
there are several ways of water being able to go
through this cycle.
Evaportranspiration, evaporation, and
sublimate.
Benny McMullen
Additional content
1. Atmospheric ozone encircles the globe, providing a protective barrier against harmful solar UV-B
radiation for all living things on the earth's surface. Life appeared on the earth’s surface only after this
thin protective layer of ozone developed.
2. Without this protection of the ozone layer in the stratosphere, UltraViolet B radiation causes a variety
of health problems for most living things. The health problems are: changes in plant growth and form
and development; orientation and motility in plankton the base of the food chain for ocean creatures;
and damage to early developmental stages of fish, shrimp, crabs, amphibians.
3. A theory of ozone depletion by CFCs was published in a magazine, in 1974. Despite these warnings,
by the year 2000, these chemicals had reduced the ozone layer by as much as 66% over Antarctica.
This created an ozone hole equivalent in area to that of the continental United States.
Tamer Fahel
4. Ozone depletion is greatest at the poles, but hardly occurs at all near the equator. At temperate
latitudes, where most people live, ozone depletion is sufficient to produce a variety of documented
human health problems, and crop damage.
Effects on Humans (Ozone
Depletion)
UV Light, the light which is absobed by the
ozone layer, is observed to be a major
cause of skin cancer.
The body’s absorption of the UV
radiationcauses its DNA to form mutations,
which cause errors when the DNA
replicates.
The depletion of the ozone layer may also
have negative effects on crops such as rice.
Rice relies on bacteria in its roots in order to
obtain nitrogen. Thse bacteria are sensitive
to UV radiation, and increased amounts of it
may have harmful effects on the crop.
Brett Granborg
Effects on Humans (Water Cycle)
The water cycle is an extremely vital part of human
life. Without the water cycle, nothing could survive. It
is what provides our crops with water, what causes
snow to fall, what feeds lakes and rivers, an what can
dry them up; It is what causes trees to grow, and
streams to flow. Without the water cycl, hardly
anything could exist. If it suddenly stopped,there
would be no more rain or snow. Crops would die, and
not just humans, but all animals would die of hunger
and thirst. The balance of nature would not just be
knocked off, it would plummet to its death.
Brett Granborg
Water Cycle additional
details and facts
There are 40 trillion gallons of water above our heads on an
average day
70% of our earth is water
326 million cubic miles of water and 3,100 cubic miles are in the
atmosphere
The water cycle is a continuous movement of water from the
ocean, stream, lakes, or rivers
The water vapor rises into the earths atmosphere where it cools
and condescends into liquid droplets
Christian Ballesrazze
Biblography
"Water cycle -." Wikipedia, the free encyclopedia. 24 Feb. 2009
<http://en.wikipedia.org/wiki/The_Water_Cycle>.
"Ozone depletion -." Wikipedia, the free encyclopedia. 24 Feb. 2009
<http://en.wikipedia.org/wiki/Ozone_depletion>.
http://www.sustainablescale.org/AreasofConcern/Ozone/OzoneandScale
/QuickFacts.aspx
http://ga.water.usgs.gov/edu/watercycle.html
Learner.com. 25 FEB. 200 <HTTP://WWW.LEARNER.COM>
24FEB. 2009<HTTP://WWW.KIDSZONE.WS.WATER>