FREE ESSAY ON EARTH SUMMARY

EARTH SUMMARY

Earth
An Inner Terrestrial Planet
Size: About 8,000 miles in diameter Distance: 1 A.U. from the Sun 
Day: About 24 hours Year: About 365 days
General Description: Earth may be the most unique of all planets because of the life
forms we know exist here and the way they utilize the Suns energy. The Earth is composed
of a great amount of water, mostly in the form of oceans, which make up most of its
surface. It also contains various gases, of which make it possible for us humans to exist
and is a system that exists between plants and animals here.
Core/Interior: The Earth has three layers to it's interior, the inner core, outer core,
and mantle. Of these the outer core is thought to be liquid. Like most of the terrestrial
planets at birth, the Earth has been molten and undergone some differentiation allowing
the heavy material which is consisting mostly of an iron, nickel, and cobalt core making
it's density five and a half times the density of water.
Surface: Earth probably has the most unique surface with all its various landmasses and
water systems. It also has polar caps, volcanoes, and continents that have trees and
living organisms moving about on its surface. Much of the tectonic activity on Earth
created new landforms and changed other landmasses.
Atmosphere: The Earth has one of the most versatile atmospheres because of the way the
solar system here picks up water and carries it around the Earth for redistribution. We
have a thick atmosphere that consists mostly of oxygen and nitrogen that helps plants and
animals survive so well here on Earth. We also have a greenhouse effect that warms our
atmosphere and it's surface.
Satellites: The Moon is the only satellite known to exist to Earth.
Magnetic Field: The Earth has a superior magnetic field due to a core consisting of iron
and nickel. Currently the rotation of the Earth and its Coriolis effect help to create
this pull of the tides from the oceans. The northern lights or lurora Borealis can be
seen at various times in a mystifying view of beauty.
When Discovered: N/A
Notes: By far the most unique item found on Earth is the Fact that life is known to exist
here and successfully grow, cultivate and prosper due to our oxygen content. Mostly due
to the fact that we exist in a system of gases that are exchanged between plants and
animals. Nowhere else is there such a known diverse system of travel that allows us to
explore our planet.