molten mixture of rock forming substances, gases and water from the mantle

liquid magma that reaches the surface and exits the volcano

a major belt of volcanoes that rims the Pacific Ocean

a string of islands formed by the volcanoes along a deep ocean trench

an area where magma from deep within the mantle melts through the crust above it

the resistance of a liquid to flowing

material found in magma that is formed from the elements oxygen and silicon

a hot, fast moving type of lava that hardens to form smooth rope like coils

a cooler, slow moving type of lava that hardens to form rough chunks

the pocket beneath a volcano where magma collects

a long tube through which magma moves from the magma chamber to the Earth's surface

the area covered by lava as it pours out of a volcano's vent

the opening through which molten rock and gas leave a volcano

a bowl shaped area that forms around a volcano's central opening

the expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption

when a volcano is not currently active but may become active in the future

when a volcano is no longer active and is unlikely to erupt again

wide gently sloping mountain made of layers of lava; formed by quiet eruptions

steep cone shaped mountain made of volcanic ash, cinders and bombs piled up around the volcano's opening

tall, cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials

large hole at the top of a volcano formed when the roof of the volcano's magma chamber collapses

deposit of hardened magma in a volcano's pipe

slab of volcanic rock formed when magma forces itself across rock layers

slab of volcanic rock formed when magma squeezes between layers of rock

a mass of rock formed when a large body of magma cools inside the crust

heating of underground water by magma

fountain of water and steam that builds up pressure underground and erupts at regular intervals

molten material that has left the volcano

Which boundaries do volcanoes form on?

The viscosity of lava that is lighter in color and flows slower is

Lave that flows faster and is darker in color has a viscosity that is

What created the Hawaiian Islands?

What TWO factors determine the viscosity of magma/lava?

If an oceanic and continental plate come together at a convergent boundary, what will determine which plate will be subducted under the other?

Where are most active volcanoes located?

Which is an example of an Island Arc?

What is the main ingredient of lava and magma?

What substance cannot be broken down into other substances?

What is a substance that is made up of two or more elements?

molten rock that is still inside a volcano

molten material after it has exited a volcano

Particles a free to move around on another freely and can flow from place to place in a

Which is formed from Aa?

Which is formed from Pahoehoe?

Where in the United States are most volcanoes located?

As the temperature of magma increased what happens to it's viscosity?

natural pool of water that collects on the surface after the ground water has been heated by magma

The main danger from a quiet volcanic eruption is

Where do volcanic belts form?

The volcanoes along converging oceanic plate boundaries may form

A volcano that may erupt again in the future is known as

When small earthquakes are detected near a volcano, what can we infer?

When two plates come together, it is known as a

When two plates move away from each other, they form a