Planet EARTH
The Earth is fragile. Its surface is split into plates
(tectonic plates) which float on a rocky mantle – the
layer between the surface of the earth, its crust, and
its hot liquid core. The inside of the Earth is active
and earthquakes volcanoes and mountain building .
The Earth’s atmosphere is primarily Nitrogen (N2), 78.08 %; Oxygen (O2), 20.95 %; and Argon, 0.93%; with trace amounts of carbon dioxide and water vapor. The average atmospheric pressure on the surface is 29.91 in.Hg. The temperature on the surface ranges from –127° F to 136° F; the average temperature is 59° F.
