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Earth/Space Vocab

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Term
Definition
Universe   A whole body of things that exist  
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Atmosphere   The mass of gasses surrounding a heavenly body (planet)  
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Star   A natural body visible in the sky, especially at night, that gives off light  
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Satellite   A celestial body orbiting around the Earth or another planet  
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Comets   Bright, heavenly bodies that develop a cloudy tail as they move closer to the sun  
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Asteroids   One of thousands of small planets between Mercury and Jupiter  
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Meteoroids   Small bodies of matter in the solar system seen when falling into our atmosphere  
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Astronomy   The science of heavenly bodies and their sizes/motions/makeups  
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Dwarf planet   An object the size of a planet but is NOT a planet, moon or satellite  
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Solar system   A star with a group of heavenly bodies that revolve around it  
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Rotation   To turn on an axis or center  
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Revolution   To move in an orbit((One Earth revolution takes 365.25 days)  
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Elliptical orbit   The orbit path of some planets that is oval shaped like a flattened circle  
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Orbit   The path taken by one body circling around another body  
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Axis   A straight line on which a body(ex. planet) rotates  
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Gravity   The force of attraction between particles. It gets stronger as mass increases  
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Seasons   Four quarters into which the year is commonly divided  
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Tilt   A sloping surface or slant. The Earth is tilted 23.5 degrees  
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Created by: ilms5thgrade
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