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
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
