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KLS Review Space

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
Light Year   distance light travels in one year  
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space station   large artificial satellite on which people can live and work for long periods  
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phases of moon   different shapes of moon seen from earth that change because of angle looking at moon  
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force of gravity   pull from a body that's strength is dependent upon somethings mass and the distance between the objects  
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core   center of sun where nuclear fusion occurs  
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smallest terrestrial planet   mercury  
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largest terrestrial planet   earth  
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geocentric   earth centered universe  
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heliocentric   sun centered system  
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parallax   apparent movement of a star when seen from a different position  
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1st Law of Planetary Motion   discovered by Kepler and states that the orbits of planets are an ellipse  
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solar wind   stream of electrically charged particles that extend outward from the sun's corona  
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refracting telescope   type of telescope that uses convex lenses to gather and focus light  
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remote sensing   collection of data from a distance without coming into direct contact  
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inner planets that had signs of water   earth and mars  
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inner planets   mercury, venus, earth, mars  
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rocket stage   engine for rocket that when it runs out of fuel falls off and falls back to earth  
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outer planets   jupiter, saturn, uranus, neptune  
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characteristics of outer planets   large, made of gases like hydrogen and helium, many moons, rings, far apart  
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man made satellite   unmanned spacecraft put into orbit around earth for the primary purpose of observing the earth's surface  
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craters   round pits on moon  
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revolution   planet's motion around sun, earth's revolution takes about 365 days or one year  
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main sequence star   star that increases in brightness as it increases in temperature  
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