This US state is an archipelago formed due to the hot spot that sits beneath it
What is Hawaii?
100
This loosely packed volcano is formed by falling tephra
What is a cinder cone volcano?
100
In order for a volcanic eruption to be explosive, there must be lots of this compound in the magma
What is silica?
100
This is the largest intrusive igneous rock feature
What is a batholith?
100
This volcano is just outside of Mexico City. It may be at risk for lahars
What is Popocatepetl?
200
Besides a hot spot, what are the two things that could be happening beneath our feet that would form a volcano
What are convergent plate boundaries and divergent plate boundaries?
200
This type of volcano is not steep. It is broad with a gentle slope.
What is a shield volcano?
200
If lots of trapped gases are released in an eruption, the top of the volcano may collapse forming this
What is a caldera?
200
The word intrusive indicates that these rock features will form where
What is underground?
200
This volcano in Washington had a large eruption in 1980. It drastically changed the shape of the volcano and altered the ecosystem surrounding the volcano
What is Mt. St. Helen's?
300
After centuries, a volcano may no longer be active, meaning it is this type of volcano
What is dormant?
300
This type of volcano would probably erode and change shape most easily?
What is a cinder cone volcano?
300
These are the two trapped gases most commonly found in volcanoes
What are water vapor and carbon dioxide?
300
This intrusive rock feature forms when magma cools in a crack that crosses several rock layers
What is a dike?
300
This volcano buried the city of Herculaneum and Pompeii is an explosive eruption
What is Vesuvius?
400
Magma will flow upward out of a vent for this reason
What is it is less dense than the rock around it?
400
Composite volcanoes are formed by alternating layers of these two things
What are tephra and lava?
400
An large increase in this volcanic gas indicates that a volcano may erupt soon
What is sulfur dioxide?
400
This igneous rock feature is not intrusive, and it relies on differences in erosion to be seen
What is a volcanic neck?
400
This is a famous cinder cone volcano in Mexico
What is ParicutÃn?
500
This is the reason for Hawaii being a series of islands, rather than one large island
What is the constant tectonic plate movement?
500
Shield volcanoes have almost all quiet eruptions, meaning they have this type of magma
What is basaltic magma (low in silica)
500
These two toxic gases are both the result of volcanic eruptions. One is made from lava mixed with seawater and the other is from volcanic dust reacting with sunlight
What are LAZE and VOG?
500
Intrusive igneous rock features are found in this layer of earth