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Practice for a sience test on space GRADE 5

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
How many planets are there?   8  
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How many days is one revolution for Earth?   365 1/4 days  
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How many hours is one rotation?   24 hours  
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What is an orbit?   a path  
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What is a moon?   Any smaller object that revolves around a planet  
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Earth's moon's surface has what 3 main things?   no liquid water,no living things,more craters than Earth  
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What is a crater?   A bowl shaped area on the surface of a planet or moon  
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What is an eclipse?   when one body in space blocks light from reaching another body in space  
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What is a lunar eclipse?   Full moon passes through the shadow of Earth  
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What is a solar eclipse?   New moon casts a shadow on Earth  
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Name the colors of the stars from the hottest color to coolest color.   Blue,White,Yellow,Red  
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What is the nearest star to our solar system?   our sun  
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About how many stars are in the Milky Way Galaxy?   200-500 billion stars  
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Which arm are we in?   Orion arm  
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What is a galaxy made of?   Billions of stars,planets,gas and dusts  
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What are astronomers?   People who study space  
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The sun holds what percentage of mass for our solar system?   99%  
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What two gasses are stars made up of?   Hydrogen and helium (constantly reacting,make nuclear fusion and give off light energy and heat energy)  
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What does our sun do other than giving off light energy and heat energy?   Sun's gravity holds all our planets in orbit  
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What does are solar system contain?   Planets,moons,sun,meteoroids,comets,asteroids  
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What are asteroids?   Rocky objects(minor planets)big pieces  
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What are meteoroids?   Rocky or small objects (in space)  
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What are meteors?   Meteoroids that went into the Earth's atmosphere but has no reached Earth's surface(have long burning tails)  
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What are meteorites?   Meteoroids that have reached Earth's surface.  
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What are comets?   Tails of gas and dust (contains:rock,ice,gas)orbit close to the sun or far out past neptune  
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Where is the astroid belt?   Between Mars and Jupiter  
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What is 1 AU?   Distance from sun to earth  
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What is the biggest planet?   Jupiter  
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What is the smallest planet?   Mercury  
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Which kind of planets are denser?   INNER PLANETS  
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Which 2 planets do not have moons?   Mercury and Venus  
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Which kind of planets have more moons?   Outer planets  
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Which planet is more dense?   Earth  
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When is the test?   NEXT WEDNESDAY  
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Is orbit a noun or a verb?   noun  
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Created by: swetha4
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