Notebook Set Up review When we start a new chapter… First, go to the next clean (front and back) page in your notebook and fold in into a triangle divider On the triangle divider please write the Chapter Name; Ch. 6 – Volcanoes

Here’s how your notebook pages should look…For example… I. Volcanoes and Plate Tectonics (this title usually matches the sections in your Textbook chapter) A. What is a Volcano B. Location of Volcanoes 1. Volcanoes at Diverging Plates a. b. 2. Volcanoes at Converging Plates a. b.

The lifespan of a VOLCANO!

(yes, you can abbreviate!) I. Volcanoes & P.T. (yes, you can abbreviate!) A. What is a Volcano? 1. Weak spot on Earth’s Crust where magma, water-vapor, and gases reach the surface 2. They add new rock to Earth’s surface Mt. St. Helens, WA Krakatau, Indonesia Mount Tambora, Indonesia

Do we notice a pattern?

PACIFIC OCEAN Most of the Earth’s volcanoes occur in belts that form along plate boundaries (divergent and convergent) One of the largest volcanic belts is the Ring of Fire, which encircles the Pacific Ocean

Zoom in on the Ring of Fire

B. Location of Volcanoes 1. Volcanoes at Diverging Plates a. Form along the mid-ocean ridge b. Only some rise above the ocean’s surface (For Example, in Iceland and the Azores)

Eyjafjallajokull Example of a Divergent Boundary Volcano: Eyjafjallajokull, Iceland

B. Location of Volcanoes Oceanic & Continental Plates Collide Two oceanic plates collide 2. Volcanoes at Converging Plates (subduction zones) Subduction occurs where the edge of a continental plate collides with an oceanic plate EX. The Andes in South America, Pacific Northwest in the US The older, colder denser plate sinks into the mantle, melts, forms magma. Since magma is less dense it rises up and seeps into cracks in the overlying crust Eventually the magma breaks through the ocean floor creating a chain of volcanoes called an island arc EX. Japan, New Zealand, The Caribbean Islands

B. Location of Volcanoes Oceanic & Continental Plates Collide Two oceanic plates collide 2. Volcanoes at Converging Plates (subduction zones)

Example of a Convergent Boundary Volcano: Mt. Vesuvius, Italy geology.com

HOMEWORK Read Chapter 6, Section 1 (pages , only!) Section 1 Review, page 181, #1 and 2 in your notebook