The
Earth is the densest major body in the solar system.
orbit:
149,600,000 km from Sun
diameter:
12,756.3 km
mass:
5.972e24 kg
Most of
the mass of the Earth is in the mantle, most of the rest in the core.
values below x10^24 kilograms:
atmosphere = 0.0000051
oceans = 0.0014
crust = 0.026
mantle = 4.043
outer core = 1.835
inner core = 0.09675
71 Percent of the Earth's surface is covered
with water.
The Earth's atmosphere is
77% nitrogen, 21% oxygen, with traces of argon, carbon dioxide and water.
The oldest known rocks
are about 4 billion years.