Can You Imagine a World Without Water???

1. CAN YOU IMAGINE
A WORLD
WITHOUT WATER?

2. By –
Jayanarayan Jayakumar
Jithin Jose
Shijo John
Jacob
Basim
John P Jacob
IMPORTANCE OF OCEANS

3. OCEANS
• AN OCEAN IS A MAJOR BODY OF SALINE
WATER, AND A PRINCIPAL COMPONENT
OF THE HYDROSPHERE.
APPROXIMATELY 71% OF
THE EARTH'S SURFACE IS COVERED BY
OCEAN, A CONTINUOUS BODY OF
WATER THAT IS CUSTOMARILY DIVIDED
INTO SEVERAL PRINCIPAL OCEANS AND
SMALLER SEAS.

4. THE MAJOR OCEANS
• The major oceanic divisions are defined in part by the continents,
various archipelagos, and other criteria. These divisions are (in
descending order of size):
• Pacific Ocean, which separates Asia and Australia from
the Americas
• Atlantic Ocean, which separates the Americas
from Eurasia and Africa
• Indian Ocean, which washes upon southern Asia and separates
Africa and Australia
• Southern Ocean, sometimes considered an extension of the Pacific,
Atlantic and Indian Oceans, [6] which encircles Antarctica.
• Arctic Ocean, sometimes considered a sea of the Atlantic, which
covers much of the Arctic and washes upon northern North
America and Eurasia.

6. IMPORTANCE
• Throughout history humans have been directly or
indirectly influenced by the oceans. Ocean waters
serve as a source of food and valuable
minerals, as a vast highway for commerce, and
provide a place for recreation. Increasingly, people
are turning to the oceans for their food supply
either by direct consumption or indirectly by
harvesting fish that is then processed for livestock
feed. It has been estimated that as much as 10%
of human protein intake comes from the oceans.
Nevertheless, the food-producing potential of the
oceans is only partly realized. Other biological
products of the oceans are also commercially
used.

7. IMAGES!

8. IMAGES!

9. SHIPPING ROUTES:
• The oceans provide convenient transport routes - which we
take full advantage of. Around 90% of all trade between
countries is carried by ships. These transport everything from
food and fuel to construction materials, chemicals, and
household items.

10. OXYGEN:
• It’s not just ocean life that depends on phytoplankton. These tiny
marine plants are estimated to produce over half the oxygen that we, and
all other land animals, breathe.
CO2 SINK:
Ocean waters have the capacity to absorb vast amounts of the
greenhouse-warming gas carbon dioxide (CO2), and thus have
helped to buffer human-caused global warming and climate
change. Indeed, nearly half the CO2 produced by human
activities in the last 200 years has dissolved into the
ocean.Phytoplankton also lock CO2 away. Like land plants, these
microscopic algae use CO2 to grow. When they die, this
CO2 sinks as organic matter to the bottom of the ocean, keeping
it out of the atmosphere.

11. TEMPERATURE AND WEATHER CONTROL:
• The surface layer of the ocean absorbs over half the heat reaching the Earth
from the sun. By distributing this heat around the world, ocean currents -
which flow for thousands of kilometres, both at the surface and far below -
are extremely important in determining the climate of the world’s continents.
For example, the Gulf Stream carries warm water from the Gulf of Mexico all
the way to western Europe. This water warms the air above, which is then
blown across to the land. As a result, northwest Europe is much warmer than
other lands at the same latitude.
Hurricanes and cyclones can be destructive when they hit land, but these
tropical storms also help distribute heat from the tropics to higher latitudes
through the atmosphere.

12. Water cycle:
THE OCEANS ARE ALSO AN INTEGRAL PART OF THE WATER CYCLE.
VAST AMOUNTS OF WATER EVAPORATE FROM THE OCEAN SURFACE,
RISING INTO THE ATMOSPHERE AS WATER VAPOUR. WHEN THIS VAPOR
COLLIDES WITH COLDER AIR, IT CONDENSES TO FORM CLOUDS AND
RAIN.

13. LIFE
• A wide variety of organisms, including
algae, jellyfish, lobsters, fish, sea turtles, and
whales, live in the ocean. Many of these
organisms are threatened by pollution. Among
the causes of this pollution are the discharge of
municipal and industrial wastes, and the
accidental spilling of oil from tankers and
offshore oil rigs. A number of laws and
international agreements ban or restrict the
disposal of various pollutants into the ocean.

14. FOR MORE INFORMATION ,VISIT-
• http://www.factmonster.com/ce6/sci/
A0860103.html
• http://www.youtube.com/watch?v=83
UwUQxlqyI
• http://wwf.panda.org/about_our_eart
h/blue_planet/open_ocean/ocean_im
portance/