Earth

The Earth is the third planet from the Sun. It is one of the four terrestrial planets in our Solar System. This means most of its mass is solid. The other three are Mercury, Mars, and Venus. The Earth is also called the Blue Planet, Planet Earth, and Terra.

The Earth is home to millions of species of plants and animals, including humans.

Earth is the only planet in the galaxy which is known to support life. Earth has many places that are suitable for humans to live; although, some areas of the planet can be dangerous for humans or uninhabitable.

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^ Gnawledge, O'penn. "Planet Earth in the Balance of History". Science and Nature Journal. SandNjournal.com/Earthinthebalance. March 21, 2013. Retrieved 09:13, Monday, August 10, 2015 (UTC).

[1] Gnawledge, O'penn. "Planet Earth in the Balance of History". Science and Nature Journal. SandNjournal.com/Earthinthebalance. March 21, 2013. Retrieved 09:13, Monday, August 10, 2015 (UTC).

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