About this Study Set
This study set covers Volcanology through
20 practice questions.
Explore the basic concepts of volcanoes, including types, structures, and famous eruptions. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 20 questions from the
Introduction to Volcanology study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is molten rock called while it is still underground?
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A
Lava
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B
Magma
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C
Basalt
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D
Ash
2
What is the term for molten rock once it reaches the Earth's surface?
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A
Magma
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B
Lava
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C
Crystal
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D
Sediment
3
Which major area in the Pacific Ocean is home to most of the world's active volcanoes?
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A
The Atlantic Ridge
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B
The Bermuda Triangle
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C
The Ring of Fire
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D
The Arctic Circle
4
What type of volcano is broad and flat, resembling a warrior's shield?
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A
Cinder Cone
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B
Stratovolcano
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C
Shield Volcano
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D
Caldera
5
Which volcano type is known for its tall, conical shape and explosive eruptions?
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A
Shield Volcano
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B
Fissure Vent
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C
Stratovolcano
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D
Lava Dome
6
What is a volcano called if it is currently erupting or shows signs of erupting?
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A
Dormant
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B
Extinct
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C
Active
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D
Silent
7
A volcano that has not erupted for a long time but is expected to erupt again is called:
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A
Active
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B
Extinct
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C
Dormant
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D
Dead
8
What is the name of the large, bowl-shaped depression formed when a volcano collapses?
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A
Crater
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B
Caldera
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C
Vent
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D
Fissure
9
Which volcanic rock is unique because it is light enough to float on water?
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A
Obsidian
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B
Basalt
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C
Pumice
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D
Granite
10
What is the naturally occurring volcanic glass formed when lava cools very quickly?
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A
Obsidian
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B
Quartz
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C
Diamond
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D
Slate
11
What is the primary gas released during most volcanic eruptions?
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A
Oxygen
-
B
Nitrogen
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C
Water Vapor
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D
Helium
12
What is the term for a fast-moving current of hot gas and volcanic matter?
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A
Lava flow
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B
Pyroclastic flow
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C
Mudslide
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D
Tsunami
13
Which famous Roman city was buried by the eruption of Mount Vesuvius in 79 AD?
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A
Rome
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B
Athens
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C
Pompeii
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D
Carthage
14
What is the opening at the top of a volcano called?
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A
Conduit
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B
Vent
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C
Crater
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D
Chamber
15
Which island chain was formed by a volcanic 'hotspot' in the middle of a tectonic plate?
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A
Hawaii
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B
Japan
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C
The Philippines
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D
The United Kingdom
16
What term describes a fluid's resistance to flow, often used to describe lava thickness?
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A
Density
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B
Viscosity
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C
Velocity
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D
Gravity
17
What are the tiny particles of jagged rock and glass blown into the air during an eruption?
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A
Soot
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B
Dust
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C
Volcanic Ash
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D
Sand
18
A volcano that is never expected to erupt again is referred to as:
-
A
Dormant
-
B
Active
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C
Extinct
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D
Sleeping
19
What is the main underground 'room' where magma is stored before an eruption?
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A
Magma Chamber
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B
Lava Tube
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C
Basement
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D
Vault
20
What do we call scientists who study volcanoes?
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A
Meteorologists
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B
Volcanologists
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C
Astronomers
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D
Biologists
