Formed when magma squeezes between horizontal layers of rocks

Area where material deep within the mantle rises then melts, forming magma

Formed when groundwater is heated by a nearby body of magma or hot rock and eventually rises to the surface to collect in a natural pool

Where is most of the magma produced on Earth on a yearly basis?

What is an example of a composite volcano?

What type of volcano has an eruption that is a high viscosity, single eruption, only last a couple of weeks, the magma solidifies and the volcano never erupts again.

The Hawaiian islands and Yellowstone National PArk are associated with which of the zones of volcanism?

Name number 12

 igneous rock bodies are called

The greatest volume of volcanic material is produced by

name number 3

The most violent type of volcanic activity is associated with

A magma's viscosity is directly related to its

Name number 11

What is the pulverized rock, lava, ash, and other fragments ejected from the center of a volcano called?

Lava that is cooler and slower moving

Name 6 and 7

Magma that reaches Earth's surface

Not active, but may become active

What feature may form in an interaplate area over a rising plume of hot mantle material?

Fluid basaltic lava, like those in Hawaii, commonly form

Name number 3

Why is the name caldera a good description of this type of land forms?

The most violent type of volcanic activity is associated with

Which type of volcano consists of layers of lava flows and pryoclastic material?

A mountain formed of lava or pryoclastic material

Name number 4

A stream of sheet of molten or solidified lava

Formed when magma forces itself across rock layers and hardness

When is the very large depression at the top of some volcanoes?

Name number 5

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

The greatest volume of volcanic material is produced by

What materials are ejected from volcanoes?

Lava flows out gradually building a wide, gently slopping mountains

When lava has high viscosity it produces ash, cinders and bombs which all build up around the vent in a steep come-shaped hill or small mountain.

What types of volcanoes are there?

Underground igneouse rock bodies are called?

When silica-rich magma is extruded, ash, hot gases, adn large fragments may be propelled from the vent at high speeds and produce which of the following?

A magma's viscosity is directly related to its

Unlikely to erupt again

 Which is NOT a factor that affects an eruption?

What type of volcano has the magma composition of fluid basaltic and only contains a small amount of pyroclastic material?

A vertical conduit below a volcano through which magma has passed and that has become filled with solidified magma

The structure that results from the cooling and hardening of magma at depth is called what?

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash.

A hard, unreactive, colorless compound that occurs as the mineral quartz and as a principle constituent of sandstone and other rocks

Formed by many volcanoes that rim the Pacific Ocean

String of islands created by volcanoes near boundaries where two oceanic plates collide and one sinks beneath the other

Which is an example of intraplate volcanism?

Is a large underground pool of liquid rock found beneath the surface of the Earth

A body of molten rock found at depth, including any dissolved gases and crystals

A hallowed-out area at the top of a volcano

Forms when magma hardens in a volcano's pipe

Huge hole left by the collapse of a volcanic mountain

Fountain of water and steam that erupts from the ground when buildup of pressure is released

A measure when magma, a few kilometers beneath Earth's surface heats underground water and forms?

A measure of fluid's resistance to flow

The volcanic rock ejected during an eruption, including ash, bombs, and blocks