Download • Once magma reaches the surface, it is called lava. • An example of

Volcanoes
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Chapter 7 Study Guide
Dr. Church 1st, 2nd, and 3rd Period
Once magma reaches the surface, it is called lava.
Hot spots can occur far from plate boundaries.
An example of a chemical property is being able to burn.
Very hot magma produces lava called pahoehoe.
Magma leaves a volcano through a vent.
An explosive eruption occurs if magma is high in silica.
A volcano that is no longer erupting but is likely to erupt again in the future is
dormant.
A volcanic neck forms when magma hardens in the pipe of a volcano.
A shield volcano forms when the volcano erupts quietly.
A geyser forms when hot water and steam are trapped underground in a
narrow crack?
A weak spot in the crust where magma comes to the surface is a volcano.
How well a liquid flows depends on its viscosity.
A long tube that connects a magma chamber to the surface is called a pipe.
A volcano that is no longer likely to erupt is said to be extinct.
A huge hole left behind when a volcano collapses is a caldera.
A volcano that erupts explosively produces ashes, cinders, and bombs.
A sill forms when magma hardens between rocks in a horizontal layer.
A batholith forms when a large amount of magma hardens beneath the crust.
Hot water from underground can be used to heat homes.
What is geothermal energy? How is it used?
The most recent earthquake in Yellowstone National Park changed the volcanic
activity there. Some geysers now erupt at different intervals than they did
before. A few geysers have stopped erupting, and some new geysers have
formed. Explain what might have happened during the earthquake to change
the geyser activity.
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.
Volcanoes
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Chapter 7 Study Guide
Dr. Church 1st, 2nd, and 3rd Period
lava
This is a Composite Volcano with
both quiet and explosive eruptions.
Lava = quiet eruption
Ash,cinders,bombs = explosive
eruptions
ash, cinders,
and bombs
magma
Convergent boundary
Magma forms at this plate boundary
because The oceanic plate sinks
beneath the continental plate and
melts.
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.