Volcanoes and Magma Quiz

Bowl-shaped top of a volcano.

Opening where materials erupt from a volcano.

Tube that connects magma to the vent.

Underground reservoir of hot, melted rock.

Hot, molten rock beneath the Earth's surface.

Solidified magma that fills the pipe of a volcano (extinct).

A horizontal sheet of magma squeezing between layers of rock.

A large mass of intrusive igneous rock that forms deep in the Earth's crust.

Rock formed from the cooling and solidification of magma beneath the Earth's surface.

A large volcanic crater formed by a collapsed volcano, such as Yellowstone.

Wide, flat areas formed by many lava flows, like Basalt River.

Smooth, ropy lava that flows easily.

Rough, blocky lava that cools quickly.

Small, steep volcano made of ash and rock fragments, typically with explosive eruptions.

Volcanoes commonly occur at convergent and divergent plate boundaries.

A zone around the Pacific Ocean with frequent volcanic and seismic activity.

Chains of volcanic islands formed at subduction zones, like Japan.

Areas where magma rises from deep within the Earth, forming volcanoes, such as Hawaii.

Physical properties describe substances without changing them; chemical properties describe reactions.

Silica levels in magma determine eruption type: low means quiet; high means explosive.

Dark, heavy rock with low silica content; example is basalt.

Light, lighter rock with high silica content; example is granite.

Viscosity of magma influences rock color: sticky magma yields light color, runny magma yields dark color.

As temperature increases, viscosity of magma decreases, making it runnier.

A volcano that is currently erupting or has erupted recently.

A volcano that is asleep and may erupt again in the future.

Lava flows destroy everything in their path.

Soil that is rich in minerals due to volcanic activity, making it fertile.

Energy generated from the heat of the Earth's interior used for heating and electricity.