Chapter 6 Review Volcanoes

Volcanoes The three stages in the life of a volcano are: Make sure you can describe each stage of a volcano’s life cycle The three main types of volcanoes are: Make sure that you know the differences between these types of volcanoes and can describe them. Active, dormant, and extinct Shield, composite, and cinder cone

Volcanoes Volcanoes can have two main types of eruptions. They are __________ and ____________. What causes an eruption to be either quiet of explosive? Another name for an explosive eruption is a Quiet and explosive The amount of silica in the magma – high is silica make explosive eruptions and low in silica makes quiet eruptions Pyroclastic flow

Volcanoes The major volcanic belt that surrounds the Pacific Ocean is called the ____________ What is the difference between magma and lava? A weak spot in the crust where molten material called magma reaches the surface is called a _______ Ring of Fire Magma is inside the Earth, lava is on the surface. Volcano

Ring of Fire

Volcanoes Due to subduction, a chain of volcanic mountains may rise to the surface of the ocean resulting in a string of islands called an _______________ Some islands form the way that the Hawaiian islands formed over a crack far from a plate boundary. These areas are called ______________. Island arc Examples are Japan, New Zealand, The Philippines, the Aleutians and others Hot Spots

Volcanoes Name the parts of a volcano Magma chamber, pipe, vent, side vent, crater, lava flow, ash cloud Make sure that you know where they would fit on this diagram.

Volcanoes What is the name for the fountain of water and steam that erupts from the ground due to heating within the Earth? What is the word for an old person, especially an eccentric old man. A geyser A geezer

Volcanoes A huge hole left in the ground by the collapse of a volcanic mountain is called a ___________. When magma hardens in a volcano’s pipe and eventually becomes exposed due to erosion, this landform is left behind. Caldera A volcanic neck

Volcanoes Magma that forces itself between or across rock layers can form these landforms. A huge mass of rock formed by hardened, cooled magma can help form a mountain range like a large portion the Sierra Nevadas. It is called a __________. Dikes and Sills Batholith

Volcanoes Thank you for watching this PowerPoint. Good luck on the test.