This is the magma that flows out onto the Earth's surface.
What is lava?
100
The three kinds of mountains created by the eruptions of volcanoes.
What are Cindercone, Shield, and Composite?
100
Molten rock beneath the earth's surface.
What is Magma?
100
This is where most volcanoes occur.
Where is plate boundaries?
100
These volanoes are currently erupting or show signs that they may erupt in the near future.
What are active volcanoes?
200
Reservoirs from which volcanic materials erupt.
What are magma chambers?
200
This volcano erupts explosively and forms a cone-shaped hill.
What is Cinder Cone?
200
A feature formed at the top of a volcano's pipe when magma hardens. It looks like a giant tooth stuck in the ground!
What is a volcanic neck?
200
The zone where the rock above a colliding plate melts to form magma, which later erupts as lava.
What is the subduction zone?
200
These volcanoes have become inactive, but people are not certain that they will not erupt again.
What are dormant volcanoes?
300
The openings near the peak of a mountain through which volcanic materials erupt.
What are vents?
300
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.
What is a shield volcano?
300
A region of volcanic activity in the middle of a tectonic plate.
What is a hot spot?
300
Magma rises for this reason.
What is because it is filled with gas and is less dense than the solid rock around it.
300
This type of eruption has a high silica content.
What is an explosive eruption?
400
This is a huge hole left behind when a volcano collapses.
What is a caldera?
400
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.
What is a composite volcano?
400
This is a broad, bowl-shaped valley that results from movement of the crust.
What is a basin?
400
This happens to magma as it approaches the earth's surface.
What is it expands because it is under less pressure?
400
These are volcanoes that have not erupted in recorded history.
What are extinct volcanoes?
500
This is a fountain of water and steam that erupts from the ground.
What is a geyser?
500
This forms when magma hardens between a vertical crack in rocks.
What is a dike?
500
This is a zone of frequent earthquakes and volcanic eruptions that encircles the Pacific Basin.
What is the Ring of Fire?
500
This is where HOT SPOTS form in relation to plate boundaries. (on? near? far from?)
Hot spots occur far from plate boundaries.
Hawaiian islands are created by hot spots.