chapter 6: earthquakes and volcanoes

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 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