Actually, earth has endless body of saltwater and scientists divide it into 5 different sections.
From smallest to biggest, they are the Arctic Oceans, the Antarctic Ocean, the Indian and the
Pacific.
Oceans are wide as well as deep. In common, an ocean is a little over two miles deep. However,
around 200 miles southwest of Guam in the Pacific Ocean, the water in the Mariana Trench is
nearly seven miles deep. That’s the most profound part of the ocean.
Oceans better save Earth’s climate habitable. By flowing water around the globe, the oceans
support to keep places from getting too warm or too cold.
Oceans also assist to keep the earth hot. You can see the hot water in a bathtub stay hot longer
than molten chocolate in a tiny cup, the large number of warm water stores warm in the ocean.
Then ocean tides carry that heat around the planet. Without them, the Earth would be a freezing
rock.
Ocean – the home for various plants and animals:
Scientists calculate that about one million species of animals exist in the ocean. 95 per cent of the
animals are invertebrates, the one that doesn’t have a backbone, such as a shrimp and a jellyfish.
Some of the tiniest animals on Earth can be seen in the ocean. Sea creatures like zooplankton are
tiny you can spot them only with a microscope. Big fish move through these waters too, such as
great manta rays, white sharks, and ocean sunfish.
The largest animal ever to survive on Earth is an ocean beast called the blue whale. It’s as large
as two school buses! Porpoises, Dolphins, and sea lions are also ocean-dwelling creatures.
The ocean fills with plant life. Most are small algae called phytoplankton and these microscopic
plants have a great job. By photosynthesis, they generate about half of the oxygen that people
and other land-dwelling animals breathe. Bigger algae like kelp and seaweed also grow in the sea
and give food and shelter for aquatic animals.
Watery habitats that live inside the ocean:
Temperature, distance from the shore and ocean depth determines the species of plants and
animals surviving in an area of the ocean. These domains are called habitats.
Coral reefs are one kind of habitation. When small creatures called polyps to die, their bones
consolidate, so other polyps can remain on top of it. Then those polyps pass away and this
process continues. After hundreds of years, this turns into a difficult structure called a coral reef
that gives food and shelter for several kinds of ocean animals. In fact, corals reefs have been
named as the rain forests of the sea due to the broad variety of animals found there. Animals
such as clownfish, seahorses, and sea turtles all exist on coral reefs. They take food from the
water using small tentacle-like arms.
Kelp forests are seen along the coastlines of the Antarctic and the Pacific Oceans likewise
provide food and shelter for aquatic life. These brown, large, rubbery plants have deep, globe-
shaped growths on the petals called pneumatocysts that support the plants rise to the surface.
Whales, Sea lions, shorebirds, and other ocean creatures make meals of the tinier critters that
hide in the plants.
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