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?

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Vocabulary

Volcano Magma Lava Hot spot Shield volcano

Composite volcano Cinder cone Volcanic ash Viscosity

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 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 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 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