Kyle Podgursky4/3/2009 Volcanoes. Kyle Podgursky4/3/2009 Introduction Volcanoes are cone-shaped mountains. Magma is hot liquid rock. Once the magma breaks.

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Presentation transcript:

Kyle Podgursky4/3/2009 Volcanoes

Kyle Podgursky4/3/2009 Introduction Volcanoes are cone-shaped mountains. Magma is hot liquid rock. Once the magma breaks through the surface it is called lava.

Kyle Podgursky4/3/2009 Stages of a volcano Active stage. Inactive stage.

Kyle Podgursky4/3/2009 Eruption Stage A volcanic eruption occurs when lava flows or ejects from a vent. Eruptions can be violent or quiet.

Kyle Podgursky4/3/2009 Cooling and Inactive Stage Even after a volcano stops erupting, gases and vapors are still released.

Kyle Podgursky4/3/2009 Types of Volcanoes Cinder cones Shield volcanoes Composite volcanoes