Earth Science

Sun

Earth

The Sun or Sol, is the star at the centre of our solar system and is responsible for the Earth’s climate and weather. The Sun is an almost perfect sphere with a difference of just 10km in diameter between the poles and the equator. The average radius of the Sun is 695,508 km (109.2 x that of the Earth) of which 20–25% is the core

Earth is the third planet from the Sun and is the largest of the terrestrial planets. The Earth is the only planet in our solar system not to be named after a Greek or Roman deity. The Earth was formed approximately 4.54 billion years ago and is the only known planet to support life.

Key Terms

axis- an invisible line around which an object spins.climate- all weather conditions for a given location over a period of time. equator- imaginary line around the Earth, another planet, or star running east-west, 0 degrees latitude. midlatitudes- geographic regions between the Equator and the poles. weather- state of the atmosphere, including temperature, atmospheric pressure, wind humidity, precipitation, and cloudiness.

Earth Facts - Interesting Facts about the Planet Earth. (2012, January 6). Retrieved February 17, 2015, from http://space-facts.com/earth/Bing- earths revolution. Retrieved February 14, 2015, from http://alturl.com/eff8cSeason. (n.d.). Retrieved February 17, 2015, from http://education.nationalgeographic.com/education/encyclopedia/season/?ar_a=1

Amy Webster

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