User:Linkiscool99/TWA/Earth







=Bold textEarth= 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 which are suitable for humans to live;although,some areas of the planet can be dangerous for humans or uninhabitable. Science shows that Earth formed around 4.5 billion years ago. The organisms that live on Earthhave completely changed its air (atmosphere); this is called a biosphere. 71% of Earth 's surface is covered in salt water oceans. Earth is the only place in the solar system where liquid water is known to exist at present. The other 29% is made of Rocky land in the shapes of continents and islands. Earth interacts with other objects in the solar system, particularly the Sun and the Moon. The Earth orbits around the Sun roughly every 365.25 days. One spin is called a Italic textday and one orbit is called a Italic textyear. This is why there are 365 days in a year, but a leap year is added to the calender every 4 years.