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100
A weak spot in the crust where magma has come to the surface.
What is Volcano
100
The molten mixture of rock forming substances, gases, and water from the mantle.
What is Magma
100
Liquid magma that reaches the surface; also the rock formed when liquid lava hardens.
What is Lava
100
A major belt of volcanoes that rims the Pacific Ocean
What is Ring of Fire
200
A string of islands formed by the volcanoes along a deep ocean trench.
What is Island Arc
200
An area where magma from deep within the mantle melts through the crust above it.
What is Hot Spot
200
The pocket beneath a volcano where magma collects.
What is Magma Chamber
200
A long tube through which magma moves from the magma chamber to Earth’s surface.
What is pipe
300
The opening through which molten rock and gas leave the volcano.
What is vent
300
The area covered by lava as it pours out of a volcanoes vent.
What is lava flow
300
A bowl shaped area that forms around a volcanoes central opening.
What is crater
300
A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions.
What is shield volcano
400
A steep, cone shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano’s opening.
What is Cinder Cone
400
A tall, cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials.
What is Composite Volcano
400
The large hole at the top of a volcano formed when the roof of a volcano’s magma chamber collapses.
What is Caldera
400
A deposit of hardened magma in a volcano’s pipe.
What is Volcanic Neck
500
A slab of volcanic rock formed when magma squeezes between layers of rock.
What is Sill
500
A slab of volcanic rock formed when magma forces itself across rock layers.
What is Dike
500
A mass of rock formed when a large body of magma cooled inside the crust.
What is Batholith
500
Energy Energy from water or steam that has been heated by magma.
What is Geothermal
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