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Solar System
 Mercury

Mercury
Reading Level
     edHelper's suggested reading level:   grades 7 to 8
     Flesch-Kincaid grade level:   7.68

Vocabulary
     challenging words:    meteorite, collision, nasa, extreme, spacecraft, telescope, atmosphere, billion, reverse, secondary, solar, beginning, crater, interior, impact, planet
     content words:    North Pole, Since Mercury, Caloris Basin

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Mercury
By Sharon Fabian 		  
1     Mercury is an extreme planet. It is the fastest of all the planets. It is one of the hottest planets, and it is also one of the coldest! It may be the site of the largest crash in the history of the solar system. Mercury may also have the strangest view of the sun in the whole universe!
 
2     Mercury zooms around the sun at a speed of 48 kilometers per second, or half as fast as the Earth travels.
 
3     At certain times and places, Mercury's surface temperature can rise to twice the temperature inside an oven when you are baking a cake. On the other hand, in the shadow of its North Pole craters, Mercury has ice like our North Pole does.

Paragraphs 4 to 9:
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