Earth Facts

How big is our Earth?

The earth is the only planet in the solar system that we are sure has life on it.

Statistics
Length of Year:	365.d56 Earth days
Length of Day	24 Hours
Diameter	12,756 Km
Mass	5.976e+24 Kg
Mean distance from sun	149,600,000 Km
Mean orbital velocity	29.79 Km/sec
Average Temperature:	23F
Composition	34.6% Iron 29.5% Oxygen 15.2% Silicon 12.7% Magnesium 2.4%Nickel 1.9%Sulfer 0.05% TItanium

Earth Facts

Earth is the third planet from the sun.
Earth is the densest planet in the solar systen.
Earth is the only object in the solar systen where we are sure life exists.
70% ot the earth's surface is covered by water.
The earth's core is composed mostly of iron.
Temperatures at the center of the earth's core may be as high as 7500 K, hotter than the surface of the Sun.
The earth's average temperature has been rising over the past century. This phenominum is known as global warming.