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Mt. St. Helens
Vesuvius
Krakatau
Fuji
Tambora
100
This word refers to a volcano that has shown signs it may erupt in the future or is already erupting.
What is active?
100
This is an area where magma has melted through crust in the middle of a plate.
What is a hot spot?
100
This is the accumulation of layers of thin, runny lava that flow over a wide area before cooling and hardening.
What is a lava plateau?
100
Magma collects in a pocket called this inside a volcano.
What is a magma chamber?
100
These minerals make volcanic soils fertile.
What are potassium and phosphorus?
200
This does not affect the thickness or thinness of magma.
What is its metal content?
200
This is the molten mixture of rock-forming substances, gases, and water deep in the Earth's mantle.
What is magma?
200
This is what volcanoes erupt on Triton.
What is liquid nitrogen?
200
This is the belt of volcanoes around the rim of the Pacific Ocean.
What is the Ring of Fire?
200
This is what erupts from volcanoes on Io.
What is sulfur?
300
This is a weak spot in the crust where magma comes through.
What is a volcano?
300
This is a mass of rock formed when a large body of magma cools inside the Earth's crust.
What is a batholith?
300
This is the result of an explosive eruption hurling ash, cinders, and bombs out of a volcano.
What is pyroclastic flow?
300
This is what forms when magma hardens in a volcano's pipe and is later exposed.
What is a volcanic neck?
300
This is what thickens magma.
What is silica?
400
This is a wide, gently sloping mountain made of hardened layers of lava.
What is a shield volcano?
400
These kinds of eruptions produce pahoehoe and aa.
What are quiet?
400
This is a fountain of steam and hot water that erupts from the ground.
What is a geyser?
400
Liquid magma flows this direction through the crust because it is less dense than the solid material around it.
What is upward?
400
This is what forms when the top of a volcanic mountain collapses.
What is a caldera?
500
This is using heated water from under ground to pipe hot water into homes.
What is geothermal energy?
500
This type of volcano is made of alternating layers of lava, ash, cinders, and bombs.
What is composite?
500
These are the types of volcanoes on Venus.
What are shield?
500
The eruption of this volcano produced casts made from impressions of bodies in the ash deposits.
What is Vesuvius?
500
This is why pyroclastic flow is loud.
What is the force of ejection?