2. THE OCEAN
An ocean is an enormous body of
saltwater. The oceans are spread on
more than 70 % of Earth's surface.
The water contains in the oceans is
about 98 percent of all the water on
Earth. Only 2 percent of water is
found in well pond river etc.
3. Five Oceans In The
World
1. The Pacific,
2. The Atlantic,
3. The Indian,
4. The Arctic, and
5. The Southern,
or Antarctic.
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4. Oceans by Size
Pacific (168,723,000 sq km)
Atlantic (85,133,000 sq km)
Indian (70,560,000 sq km)
Southern (21,960,000 sq km)
Arctic (15,558,000 sq km)
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5. Ocean Life
The ocean is the house of
about one million species of
animals. Most of them are
invertebrates. Zooplankton,
phytoplankton, big algae
small fishes like bristlemouth
and big fishes like white
sharks are also found in the
sea.
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6. Why Should We Care
About Ocean?
--------------------------------
The ocean produces over half of
the world's oxygen and absorbs
carbon dioxide largely. Oceans
help in regulating the world's
climate and temperature.We get
a lot of seafood from the ocean.
The medicine of cancer, arthritis,
Alzheimer's disease is prepared
from sea plants and animals.
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