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Solar System
 The Sun

The Sun
Reading Level
     edHelper's suggested reading level:   high interest, readability grades 4 to 6
     Flesch-Kincaid grade level:   4.18

Vocabulary
     challenging words:    burning, nuclear, radiation, surrounding, spectacular, zone, rotate, billion, convection, helium, core, mass, region, fairly, galaxy, poles
     content words:    Milky Way

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The Sun
By Patti Hutchison 		  
1     The sun. We couldn't live without it. All life on earth depends on the energy that comes from the sun. It controls our climate and weather. How much do you know about this giant ball of energy in the sky?
 
2     The sun is really a star. It is the closest one to earth. It is about 93 million miles away. The sun is the center of our solar system. All the planets revolve around it.
 
3     Although it has a diameter of about 1.3 million kilometers, the sun is only a medium star. It is known as a yellow dwarf. The sun is part of the Milky Way galaxy. Scientists believe it is just a bit older than earth, about 4.6 billion years.
 
4     The Sun is made up of several layers. It has a core. Next is the radiation zone. Above that is the convection zone. The "surface" of the sun is called the photosphere. Above the surface are two layers of gas. They are called the chromosphere and the corona.

Paragraphs 5 to 14:
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