1. Volcanoes Table of Contents Volcanoes and Plate Tectonics
Volcanic Eruptions
Volcanic Landforms

2. Volcanoes and Plate Tectonics
The Ring of Fire
The Ring of Fire is a belt of volcanoes that circles the Pacific Ocean. As with most of Earth’s volcanoes, these volcanoes form along boundaries
of tectonic plates.

3. Volcanoes and Plate Tectonics
Volcanoes and Converging Boundaries
Volcanoes often form where two plates collide.

4. Volcanoes and Plate Tectonics
Hot Spot
The Hawaiian Islands have formed one by one as the Pacific plate drifts slowly over a hot spot. This process has taken millions of years.

5. Volcanic Eruptions Inside a Volcano
A volcano is made up of many different parts.

6. Volcanic Eruptions
The “Wakulla Volcano” was a column of smoke that was last seen near Tallahassee in 1886.

7. Volcanic Eruptions Magma Composition
Magma varies in composition. It is classified according to the amount of silica it contains. The less silica that the magma contains, the more easily it flows.

8. Volcanic Eruptions Cascade Volcanoes
The Cascade volcanoes have formed as the Juan de Fuca plate sinks beneath the North American plate.

9. Volcanic Eruptions
Magma at Mount Rainier

10. Volcanic Eruptions Mt. Rainier
Mount Rainier is part of the Cascade volcanoes. All past eruptions of Mount Rainier have included ash and lava.

11. Volcanic Landforms How a Caldera Forms
A caldera is a hole left when a volcano collapses.
What is happening in the sequence of diagrams?

12. Volcanic Landforms Volcanic Mountains
Lava from volcanoes cools and hardens to form lava plateaus and three types of mountains.

13. Volcanic Landforms
Use the graphic organizer to compare and contrast two types of volcanoes.

14. Volcanic Landforms Volcanic Necks, Dikes, and Sills
Magma that cools and hardens into rock before reaching the surface forms volcanic necks, dikes, and sills.

15. Volcanic Landforms Batholiths
Batholiths are common in the western United States.

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