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Terms and Definitions
Parts of a Volcano
Types of Volcanoes
Plates
Types of Volcanoes
100

What is lava?

Lava is molten rock that erupts from volcano and flows onto Earth's surface.

100

What is #1 called on the diagram? 

Eruption/Ash Cloud

100

What type of volcano is #1?

Cinder Cone Volcano

100

Define convergent.

Most volcanoes, like most earthquakes, occur along the boundaries between shifting tectonic plates.

100
What are active volcanoes?
Active volcanoes are the volcanoes that erupt constantly.
200

What is magma?

Magma is molten rock beneath Earth’s surface.

200

What is #4 called on the diagram?

Vent

200

What type of volcano is #2?

Composite Volcano (Stratovolcano)

200

Define divergent.

As the tectonic plate moves under another (subduction zone), the rock in the mantle melts and becomes magma.

200
What are dormant volcanoes?
These volcanoes have become inactive, but people are not certain that they will not erupt again.
300

What is a magma chamber?

Magma chambers are hollows within a volcano where magma accumulates.

300

What is #3 called on the diagram?

Lava

300

What type of volcano is #3?

Shield Volcano

300

Define transform.

magma, the melted mantle, rises because it is filled with gas and is less dense than the solid rock around it.

300
What are intermittent volcanoes?
Intermittent volcanoes erupt fairly frequent intervals.
400

What are craters?

Craters are the mouth of the volcano. Forceful explosions may blow out the tops of mountains to form craters.

400

What is #6 called on the diagram?

Magma Chamber

400

What type of volcano is #4?

Shield Volcano

400

What type of plate boundary is #6?

Transform.

400
What are Extinct Volcanoes?
Volcanoes that have not erupted in recorded history are considered to be extinct volcanoes.
500

What is a vent?

Vents are openings in Earth’s surface where volcanic materials escape.

500

What is #2 called on the diagram?

Crater

500

What type of volcano is #5?

Composite Volcano (Stratovolcano)

500

What type of plate boundary is #7?

Convergent.

500
How do the types of volcanic eruptions differ?
Active: erupt constantly Intermittent: erupt at fairly frequent intervals Dormant: have become inactive but might erupt in future Extinct: have not erupted within recorded history