Molten rock that has erupted onto the Earth's surface

Introduction to Volcanology

Volcanology

A collection of fundamental questions about the science of volcanoes, covering their formation, types, and associated phenomena.

volcanoes geology earth science

18 Questions Easy Ages 5+ Aug 8, 2026

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About this Study Set

This study set covers Volcanology through 18 practice questions. A collection of fundamental questions about the science of volcanoes, covering their formation, types, and associated phenomena. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 What is the scientific study of volcanoes called?

A Geology
B Seismology
C Volcanology
D Paleontology

2 Molten rock found beneath the Earth's surface is known as:

A Lava
B Ash
C Magma
D Pumice

3 What is the primary gas released by most volcanoes?

A Nitrogen
B Oxygen
C Carbon Dioxide
D Water Vapor

4 A volcano that has not erupted in recorded history but is expected to erupt again is classified as:

A Extinct
B Dormant
C Active
D Fossilized

5 Which type of volcano is characterized by steep sides and a cone shape, often built from layers of lava and ash?

A Shield Volcano
B Cinder Cone Volcano
C Stratovolcano (Composite Volcano)
D Caldera

6 Where are most volcanoes found on Earth?

A In the middle of continents
B Along mountain ranges
C Around the edges of tectonic plates
D In deep ocean trenches

7 What is lava?

A Molten rock that has erupted onto the Earth's surface
B Solidified rock found underground
C Gases trapped within the Earth
D Fragments of volcanic rock ejected into the air

8 A large, bowl-shaped depression formed by the collapse of a volcano after an eruption is called a:

A Crater
B Vent
C Caldera
D Cone

9 Which of the following is a fine, powdery volcanic rock fragment ejected during an eruption?

A Lava Bomb
B Volcanic Ash
C Lava Flow
D Pumice

10 Volcanoes that are expected to erupt again but are not currently erupting are called:

A Extinct
B Dormant
C Active
D Submerged

11 Which tectonic plate boundary is most commonly associated with volcanism?

A Transform boundary
B Divergent boundary
C Convergent boundary (subduction zones)
D Plateau boundary

12 The movement of magma beneath the Earth's crust can cause:

A Earthquakes
B Tsunamis
C Floods
D Landslides

13 What is a shield volcano known for?

A Steep slopes and explosive eruptions
B Broad, gently sloping sides formed by fluid lava flows
C Frequent ash clouds
D Underground magma chambers

14 A volcano that is not expected to erupt again is classified as:

A Dormant
B Active
C Extinct
D Inactive

15 What is the molten rock that erupts from a volcano called?

A Magma
B Lava
C Pyroclastic flow
D Volcanic bomb

16 What is the main characteristic of a cinder cone volcano?

A It is very large and flat.
B It is built from ejected lava fragments that solidify.
C It has extremely gentle slopes.
D It is typically found underwater.

17 What is the term for a mixture of hot gas, ash, and rock that flows rapidly down the sides of a volcano?

A Lava flow
B Mudflow (lahar)
C Pyroclastic flow
D Volcanic gas emission

18 Which of the following is NOT a volcanic hazard?

A Lava flows
B Tsunami
C Volcanic ash
D Pyroclastic flows

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