What is a Volcano? – Chapter 10 – Quiz Questions #1
pp. 201 - 208

1.      What is the difference between magma and lava?

2.      Imagine a volcano with only one vent. What change might cause a second vent to appear on the side of the volcano?

3.      About 7,000 years ago, Mount Mazama erupted and the summit (top) of the volcano collapsed forming a depression that was filled with rain and melted snow. The depression is now called Crater Lake. Mount Mazama is an extinct volcano. What is the best term to describe the depression that holds Crater Lake?

4.      Which kind of volcano is being described below? Use one of these terms:  active, dormant, or extinct.

a. No longer erupting --

b. Could be described as “sleeping” --

c. May erupt in the future but is not erupting at present or recently --

d. Erupting on a regular basis --

e. The volcano is eroding and a volcanic rock is exposed --

5.      What is the difference between a dormant volcano and an active volcano?

6.      Based on your reading in this section, answer these questions:

a. Under what conditions of temperature and pressure does a solid rock begin to melt?




b. Under what conditions of temperature and water content does a solid rock begin to melt?