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 What Is a Volcano?

What Is a Volcano?

A Short Reader

Reading Level
     edHelper's suggested reading level:   grades 3 to 5
     Flesch-Kincaid grade level:   4.75

Vocabulary
     challenging words:    fury, molten, atmosphere, mighty, lava, rocks, volcano, surface, deep, river, cause, volcanic, fear, part, different, world
     content words:    Pacific Ocean

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What Is a Volcano?
By Erin Horner 		  
1     Volcanoes are shaped like mountains. Deep inside a volcano is a pool of molten rock. When a lot of pressure builds up inside an active volcano, it erupts. These eruptions can cause mudslides and hot ash flows. They can also cause lava flows. Lava is a type of rock that is so hot it melts. It spews out of a volcano like a bright, orange river. When the lava cools down, it hardens. Then it forms many different types of rocks.
 
2     There are more than 500 active volcanoes in the world. More than half of these are .....
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