It's formed when molten material comes to Earth's surface through a weakness in the crust.
What is a volcano?
100
It's why magma rises to the surface, and the main cause for its force.
What are dissolved gases?
100
This substance is stored in a chamber beneath the volcano.
What is magma?
100
This volcano is steep, cone-shaped, and capable of explosive eruptions
What is a cinder cone volcano?
100
FINAL JEOPARDY: This material is formed from oxygen and silicon, most abundant in the Earth's crust. It's a great determinant for how a volcanic eruption is affected.
What is silica?
200
It's a molten mixture of rock-forming substances, gases and water from the mantle.
What is magma?
200
These features form along a subduction zone. SOme examples include Japan, New Zealand, and the Aleutian Chain of Alaska.
What is an island arc?
200
This connect the magma chamber to the Earth's surface.
What is the pipe?
200
This feature exposed harder rock after magma cools and hardens inside a volcanic pipe.
What is a volcanic neck?
200
A volcano in this state is unlikely to erupt again, as it is cut-off from the supply of magma.
What is an extinct volcano?
300
It's magma on the Earth's surface.
What is lava?
300
This term describes a volcano currently erupting or showing signs of eruption.
What is an active volcano?
300
Sometimes molten rock and gases escape by other means besides the vent.
What is the side vent?
300
This large body of magma cools inside the crust.
What is a batholith?
300
When magma flows easily and it just oozes, it's considered to be this kind of eruption.
What is quiet?
400
Volcanoes are formed at a mid ocean ridge (diverging plate boundary), at a subduction zone (Converging plate boundary), and at this place.
What is a hot spot?
400
If magma is considered to be very fluid, then the temperature of the magma must be this.
What is higher?
400
This is a bowl-shaped feature which forms at the top of the volcano around the central vent.
What is a crater?
400
These features form when magma forces itself in between rock layers, and across rock layers, respectively.
What is a sill and a dike?
400
This type of lava is cooler, and slower moving, as a result of a quiet eruption.
What is aa?
500
This is the name given to the major volcanic belt around the Pacific Ocean rim. It's also a song by Johnny Cash.
What is the Ring of Fire?
500
This term describes material such as cinders, ash and volcanic rock, being tossed out of a volcano in an eruption.
What is a pyroclastic flow?
500
The crater collapses in on itself after an eruption and forms this feature.
What is a caldera?
500
This feature is formed by magma which rises and is blocked by horizontal rock layers. The Black Hills of South Dakota are a perfect example of this.
What is a dome mountain?
500
It's why magma flows upward through the cracks in the rock.
What is the molten material is less dense than the surrounding rocks?