The Earth is the third planet from the Sun, with Mercury and Venus being closer. Its unique position gives the Earth a temperate climate, allowing the chemical reactions necessary to sustain life. But over the years, the climate has varied enough to melt the ice caps near the North and South poles, or to cause glaciers to move south in an Ice Age.
-Earth has a diameter of roughly 8,000 miles
-It has a form of a globe
-71% of the earth is water
-29% of the Earth is made of rock
-Earth's atmosphere is roughly 78% nitrogen