Compléter THE EARTHVersion en ligne The Earth: conditions for life, rotation and revolution. par elvira lopez rivera 1 third fifth water home life surface poles The Earth is our planet . It is the planet from the Sun . It is the - largest planet in the Solar System . It is a sphere , but it is slightly flattened at the . It has a solid with mountains , valleys , plains , etc . It is the only known planet with large amounts of liquid . It is the only planet known to support . 2 distance oxygen life oceans water temperature atmosphere Life on Earth The Earth is the only planet in the Solar System with the conditions for to exist . These conditions are : The from the Sun is just right for water to remain in a liquid state . The is not too hot and not too cold . Liquid is essential for all life on Earth . It covers more than 70% of the Earth's surface . Most of it is salt water in the . The is the layer of gases that surrounds the Earth . It keeps the Earth's surface at a comfortable temperature . It contains the that we breathe . 3 Sun axis Movements of the Earth The Earth moves in two different ways . It spins on its and it travels around the . 4 day daytime rotation axis night Rotation The Earth spins or rotates on its own . The Earth takes one ( about 24 hours ) to complete one spin . Day and night are caused by the Earth's . ? It is on the side of the Earth that faces the Sun . ? It is - time on the side that faces away from the Su n 5 winter year Seasons Sun orbit summer Revolution The Earth orbits or revolves around the . The Earth takes one ( about 365 days ) to complete one around the Sun . occur because the Earth's axis is tilted and it always points in the same direction . ? In , the Northern Hemisphere is tilted away from the Sun . ? In , the Northern Hemisphere is tilted towards the Su n
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