1. Introduction to Volcanoes! MEXICO ECUADOR 8SCIENCE Mon. April 11 PASTO INDONESIA COSTA RICA

2. What is a volcano? A volcano is an opening in the Earth’s surface Most volcanoes are dormant Not currently active Active volcanoes Hawaii: Kilauea volcano Iceland: “the land of fire and ice”

3. How is a volcano formed? Inside the earth heat and pressure causes rock to melt and turn to magma Magma is forced up to the surface of the Earth because it is less dense flows out through an opening called a vent The lava cools quickly to form layers

6. Some areas in the mantle are hotter than others

7. These hot spots melt rock and is forced upwards toward the crust

8. Volcanoes are formed in a line because the Pacific plate is moving over the hot spot