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SECTION
VOLCANOES AFFECT EARTH’S LAND, AIR, AND WATER
3.3 Reinforcing Key Concepts
BIG IDEA
Mountains and volcanoes form as tectonic plates move.
KEY CONCEPT
Volcanoes affect Earth’s land, air, and water.
Damage from a volcanic eruption can stretch far
from the volcano. Two of the immediate effects of a volcanic eruption are listed below. Write
a brief description of each.
1. Volcanic eruptions affect the land.
a. steam explosions
b. mudflows
Volcanic gases can lift ash high above an
erupting volcano. Why is volcanic ash a worldwide concern?
Hot springs, geysers, and fumaroles are three features
that result when the heat of volcanic activity raises the temperature of water or gases. Write a
brief description for each of these features in the table below.
3. Volcanic activity affects water.
Hot Springs
Geysers
Fumaroles
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
CHAPTER 3
Mountains and Volcanoes
2. Volcanic gases and ash affect the air.
174 THE CHANGING EARTH, CHAPTER 3, REINFORCING KEY CONCEPTS
174-174-sean-urb-b0303-rkc 174
3/11/04, 9:14:33 AM
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