User:Carlalexbatista/TWA/Earth





=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 Earth.

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

The earth is the planet that has the best conditions for both animals and plants to develop. Science shows that the Earth formed about 4.5 billion years ago. Organisms that live on Earth have completely changed their air (atmosphere); this is called a biosphere. 71% of the Earth's surface is covered by saltwater oceans. The Earth is the only place in the Solar System where liquid water is known to exist today. The other 29% is formed by rocky terrain in the form of continents and islands. The Earth interacts with other objects in the Solar System, particularly the Sun and Moon. The Earth orbits the Sun approximately once every 365.25 days. A rotation is called a day and an orbit around the Sun is called a year. That's why there are 365 days in a year, but a leap day added to the calendar once every 4 years.