1. Kyle Podgursky4/3/2009 Volcanoes

2. 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.

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

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

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

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