The Earth, our home planet, is the only known planet to us that inhabits life.
The name Earth is at least 1,000 years old. All of the planets, except for Earth,
were named after Greek and Roman gods and goddesses. However, the name Earth is a
Germanic word, which simply means “the ground.”
Earth is a rocky planet with a solid and dynamic surface of mountains,
canyons, plains and more. Most of our planet is covered in water.
Earth's atmosphere is 78 percent nitrogen, 21 percent oxygen and
1 percent other ingredients—the perfect balance to breathe and live.
Our atmosphere protects us from incoming meteoroids, most of which break
up in our atmosphere before they can strike the surface.