1. 1 Holly Johnston VOLCANO

2. 2 Introduction Volcanoes are cone shaped mountains that are created when magma breaks through the Earth’s surface.

3. Holly Johnston3 Stages of Volcanic Activity Eruption Stage Cooling and Inactive Stage Volcanic activity can range from permanently active to inactive.

4. Holly Johnston4 Types of Volcanoes Three main types of volcanoes are: Cinder Cone Shield Composite

5. Holly Johnston5 Types of Lava Rocks There are two main types of lava rocks Basalt Obsidian

6. Holly Johnston6 Conclusion While volcanoes can be explosive and destructive, they are a natural occurrence that should be appreciated and studied Volcanoes begin by magma erupting through the Earth’s crust.