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 Good and Bad Ozone

Good and Bad Ozone
Reading Level
     edHelper's suggested reading level:   high interest, readability grades 5 to 7
     Flesch-Kincaid grade level:   5.1

Vocabulary
     challenging words:    bromine, carpooling, ozone-depleting, stratosphere, phytoplankton, troposphere, negative, production, greatly, smog, repaired, estimate, ozone, atmosphere, chlorine, affected

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Other Languages
     Spanish: Ozono bueno y ozono malo

Good and Bad Ozone
By Patti Hutchison 		  
1     Caption: Image of the largest ever recorded ozone hole over Antarctica, September 2000.
 
2     You hear a lot about ozone on TV and radio. The ozone has a hole in it. There are high ozone levels in the air. This information can be very confusing. What is ozone, anyway?
 
3     Ozone is a gas. It is made of three oxygen atoms. It always has the same chemical structure, no matter where it is located. But location does matter if you're talking about "good" or "bad" ozone. Good ozone is found miles above the ground. Bad ozone is found near the ground.
 
4     Earth's atmosphere is made of layers. The troposphere is closest to the ground. It reaches about six miles above the Earth. The stratosphere is the next layer. It stretches from about six miles to about thirty miles above the earth. In the stratosphere, ozone is good. When found in the troposphere, it is bad.

Paragraphs 5 to 15:
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