Tuesday, July 12, 2011

Earth

Earth is the third planet from the sun and the fifth biggest out of all eight planets

the shape of the Earth is very close to that of an oblate spheriod , a sphere flattend along the axis from pole to pole such that there is a buldge around the equator .
there are verying numbers for the distance from Earth to venus each number depends on the relative position if each planet in it's elliptical orbit. the point when the planets are at their closest approach

our planet is made of four main layers the outer layer is called the crust below the mantle ,which is solid near the top and molten below .tempratures become hotter near the Earth's center the outer core is a mass of molten rock. the temprature of the inner core is over 5,000 C

earth is 4.5 billion years old and is the only planet known to have life

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