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1. All about the
Earth's Oceans
Oceans were made during the Earth's formative
years. In the beginning, the Earth was extremely hot
and gases escaped from it. Steam which was also
released, covered the planet with thick clouds. As the
Earth cooled gradually, rain fell from these clouds,
collecting water in low-lying places on the Earth's
surface. The water got deeper and formed oceans as
more rain fell.
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Geography for Kids mocomi.com/learn/geography/

2. All about the
Earth's Oceans
Scientists believe that planets and the sun were
formed from large clouds of dust and gas. Parts of
this cloud started spinning collecting dust and gas
which stuck together. These collections of dust and
gas also attracted other matter. Over time, these
collections of dust, gas and other matter grew into
the Earth, the other planets and the sun.
M
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3. As the Earth spun, it got smaller. The heavier
materials went to the center and the lighter ones
rose to the surface. The Earth was so hot initially
that the surface rocks were molten. Gases, including
steam, bubbled out of this liquid rock. More gases
and steam were forced out of the Earth with lava
from volcanoes. The steam formed huge clouds.
When rain fell from these clouds, at first, the Earth's
immense heat turned this rain back into steam but
then as the Earth slowly cooled and its crust formed,
the rainwater settled on the Earth's surface.It is
unknown how much rain the Earth received back
then, but it is certain that it was enough to fill up vast
oceans.
All about the
Earth's Oceans
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4. WHAT IS THE OCEAN FLOOR LIKE
The ocean floor consists of long chains of mountains
which form mid-ocean ridges that rise to the heights
of 3 kilometers, taller than even Mt. Everest. There
are trenches too that run deep beneath the ocean
bed. The ocean floor is also home to several
volcanoes.
When oceanic plates move apart, they form mid
ocean ridges. When the plates move into each other,
they form trenches. As plates move against each
other, they cause terrible earthquakes.
All about the
Earth's Oceans
Plate
Plate
Plate
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5. HOW DEEP CAN WE GO IN THE OCEANS?
The deeper you dive into the ocean, the more the
water pressure. Underwater vessels need to be
extremely strong to withstand such pressure. Some
of the strongest vessels can dive up to about 20,000
feet.In the ocean depths, water pressure is very
high.Underwater vessels have to be extremely
strong to withstand such pressure. Some of the
strongest can dive to depths of about 20,000 feet.
20,000 feet
All about the
Earth's Oceans
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6. PROJECT
All about the
Earth's Oceans
M
Try doing this experiment. Ask your parents to boil
some water. Once the water reaches boiling point
open the lid. You will see that steam rushes out of
the vessel. Now carefully place the cover of the
vessel above the steaming water, you will find that
the steam collects on the cover of the vessel. What
happens thereafter?
Take a bucket of water and try and sink a plastic toy
in it. You will see than no matter how hard you try to
push it down, the toy always keeps coming up. Why
does this happen?
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