Earth
editThe 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.
Tectonic plates
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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.
Shape and structure
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Science shows that Earth formed around 4.5 billion years ago.
Atmosphere
editThe organisms that live on Earth have completely changed its air (atmosphere); this is called a biosphere.
Surface
edit71% 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 shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon.
Weather, climate, and water cycle
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Orbit and Rotation
editThe Earth orbits the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year, but a leap day added to the calendar once every 4 years.[1]
References
edit- ^ Steffen, W., Richardson, K., Rockström, J. et al. The emergence and evolution of Earth System Science. Nature Reviews Earth & Environment. 1, 54–63 (2020). https.//doi.org/10.1038/s43017-019-0005-6. Retrieved 22:04, Monday, June 10, 2024 (UTC).