CHAPTER 6: EARTHQUAKES AND VOLCANOES

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Presentation transcript:

CHAPTER 6: EARTHQUAKES AND VOLCANOES

Lesson 2: VOLCANOES

?? Essential Questions How do volcanoes form? What factors contribute to the eruption style of a volcano? How are volcanoes classified?

Vocabulary Volcano Composite volcano Magma Cinder cone Lava Volcanic ash Hot spot Viscosity Shield volcano

What is a Volcano? Volcano is a vent in Earth’s crust through which melted -or molten- rock flows. Molten rock below Earth’s surface is called magma

How do volcanoes form? Convergent Boundaries Divergent Boundaries Molten rock that erupts onto Earth’s surface is called lava Divergent Boundaries Hot spots Volcanoes that are not associated with plate boundaries are called hot spots

Where do volcanoes form? The Ring of Fire

Where do volcanoes form? Volcanoes in the United States

Types of Volcanoes Shield volcanoes Composite volcanoes Common along divergent plate boundaries and hot spots. Are large with gentle slopes Composite volcanoes Large, steep-sided volcanoes that result from explosive eruptions Cinder volcanoes Small, steep-sided volcanoes

Volcanic Eruptions Eruption Style Effects of Volcanic Eruptions Magma Chemistry Dissolved Gases Effects of Volcanic Eruptions Lava Flows Ash Fall Mudflows Pyroclastic Volcanic Eryptions Predicting Volcanic Eruptions

Volcanic Eruptions and Climate Change

Homework Textbook: Page 211 #1-8 Workbook: Chapter 6 Write down question and answer