Our home in space
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| The Earth Planet |
Earth is the third planet from
the Sun which is the densest planet and the fifth largest of the eight planets
in the Solar System. Planet Earth is also the largest of the four terrestrial
planets of the Solar System. Earth is sometimes called the world or Planet
Blue.
Earth formed about 4.54 billion
years ago, and life appeared on its surface in the first billion years.
Terrestrial biosphere and then slowly change the atmosphere and other basic
physical conditions, which allow the proliferation of the organism as well as
the formation of the ozone layer, which together with the Earth's magnetic
field block the harmful solar radiation and allow microscopic living creatures
to breed safely on the mainland. The physical properties, geologic history, and
the Earth's orbit could allow life to survive.
Earth's lithosphere is divided
into several rigid segments, or tectonic plates, which have movement across the
surface of the Earth for millions of years. More than 70% of Earth's surface is
covered by water, and the remainder consisting of continents and islands which
have many lakes and other water sources that contribute substantially to the
formation of the hydrosphere. Pole Earth mostly covered with ice; solid ice in
the Antarctic ice sheet and sea ice in the polar ice pack. Earth's interior
remains active, with a core composed of iron in solid, while the outer core
fluid form that creates a magnetic field, and a thick layer of relatively solid
mantle piece.
Earth is the only planet habitable living things.
This is because the air in the Earth's
atmosphere and there is sufficient water available.
The average temperature at
the earth's surface is also very good for the survival of living beings.
Humans are
the inhabitants of the earth for living on planet earth.
Humans have inhabited
the earth for thousands of years.
Plants and animals have been here even
longer.
Around the
world, people have made up a story
to explain the formation of the earth.