Show:
Parts of a Volcano
Volcanic Landforms
Vocabulary
The Creation of Volcanoes
Eruptions
100
What is lava?
Lava is magma that flows out onto Earth's surface.
100
what three kinds of landforms are created by the eruptions of volcanoes? Name all.
There are 3 types of volcanic landforms: Cindercone, Shield, and Composite
100
What is Magma?
Molten rock beneath the earth's surface.
100

Where do most volcanoes occur?

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 are magma chambers?
Magma chambers are reservoirs from which volcanic materials erupt.
200
What is a cinder cone volcan?
This type of volcanic landform is made up of small rock particles, or cinders. It is characterized by a small cone with steep sides.
200

Define a composite Volcano

Large, explosive volcano

200

What plate boundary do volcanos typically NOT form at?

Transform boundaries

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 vent? where is it located?
Openings through which volcanic materials erupt are called vents. They are located near the peak of the mountain.
300
What is a shield volcano?
This type of volcano is made up of layers of lava rocks. it's not as steep as cinder cone volcano and is created slowly that's why it has gentle and broad sides.
300
What is a hot spot?
A region of volcanic activity in the middle of a tectonic plate.
300

Why does magma rise?

Because it is filled with gas and air and becomes less dense than the surrounding solid rock.

300

What do we call a quiet eruption?

Effusive erruptions

400
What are craters?
Craters are bowl-shaped depressions. Forceful explosions may blow out the tops of mountains to form craters.
400
What is a composite volcano?
This type of volcanic landform is made up of layers of lava flows alternating with layers of ash, cinders, and rocks. it is a combination of cinder cone and shield volcanoes.
400
What is a volcanic island arc?
A long curved chain of volcanic islands.
400
what prevents magma from gradually and slowly rising to the peak of the mountain?
The rocks above magma press down on the magma and create great pressure. When the pressure is released, volcanic materials suddenly erupt and move out to the surface.
400
What are Extinct Volcanoes?
Volcanoes that have not erupted in recorded history are considered to be extinct volcanoes.
500

Define Plate tectonics and how they are related to volcanoes

answers vary

500

Which type of volcanio is the most destructive? Name a volcanic landform that was developed this way.

Composite volcano. Mt. St. Helens is a composite volcano.

500

what is Ring of Fire and where is it located?

A zone of frequent earthquakes and volcanic eruptions in the Pacific Ocean.

500

How do hot spots form new land? Name a landform created by hot spots.

Hot spots erupt and release magma. As magma comes out it becomes lava and hardens into landforms. Hawaiian islands are created by hot spots.

500

How do the types of volcanic eruptions differ?

They erupt differently based on the thickness or viscosity of the magma.