Volcanoes are Hot Stuff

Information about Volcanoes are Hot Stuff

Published on June 15, 2007

Author: FunSchool

Source: authorstream.com

Content

Volcanoes are Hot Stuff:  Volcanoes are Hot Stuff By Shana Huffaker And Doreen Snyder How are volcanoes formed?:  How are volcanoes formed? Slide3:  Deep in the earth it is very hot. It is so hot that rocks melt. The melted rock is called magma. The magma is lighter than the rocks around it so it rises. Sometimes it finds a crack or hole in the earth’s crust and bursts through. This is how a volcano begins. Why do volcanoes erupt?:  Why do volcanoes erupt? Pressure builds deep in the earth where the magma is. Suddenly the gases escape and violently explode. It is kind of like toothpaste squirting out of a tube when you give it a hard squeeze.:  Pressure builds deep in the earth where the magma is. Suddenly the gases escape and violently explode. It is kind of like toothpaste squirting out of a tube when you give it a hard squeeze. What are the different kinds of volcanoes?:  What are the different kinds of volcanoes? Volcanoes do not all look alike. Their shape is based on what type of materials they erupt. There are three main kinds, or shapes, of volcanoes. :  Volcanoes do not all look alike. Their shape is based on what type of materials they erupt. There are three main kinds, or shapes, of volcanoes. ShieldVolcanoes:  Shield Volcanoes Volcanoes that build up from many slow, steady, flows of hot lava, are called shield volcanoes. This kind of volcano is low and broad with gently sloping sides. They look like a warriors shield.:  Volcanoes that build up from many slow, steady, flows of hot lava, are called shield volcanoes. This kind of volcano is low and broad with gently sloping sides. They look like a warriors shield. Slide10:  Cinder Cone Volcanoes:  Cinder Cone Volcanoes Cinder cone volcanoes form when solid rock and ash shoot up into the air and fall back around the volcano opening. The cinder cone volcano has steeply sloped sides.:  Cinder cone volcanoes form when solid rock and ash shoot up into the air and fall back around the volcano opening. The cinder cone volcano has steeply sloped sides. Slide13:  Strato or Composite Volcanoes:  Strato or Composite Volcanoes Strato volcanoes, also called composite volcanoes, erupt with molten lava, solid rock, and ash. The layers pile up much like layers of cake and frosting. The layers form into symmetrical cones, and the slopes are steep. :  Strato volcanoes, also called composite volcanoes, erupt with molten lava, solid rock, and ash. The layers pile up much like layers of cake and frosting. The layers form into symmetrical cones, and the slopes are steep. Slide16:  There is much more about volcanoes out there. Look in books and on the internet . Have Fun!:  There is much more about volcanoes out there. Look in books and on the internet . Have Fun! Slide18:  Pictures, Images, and information From: Soames Summerhays/Photo Researchers, Inc. Kraft-Explorer/Photo Researchers Inc. Masao Hayashi-Dung/Photo Researchers Inc. Why Do Volcanoes Blow Their Tops? By Melvin and Gilda Berger www.usgs.gov/education/learnweb/volcano/index.html

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