Magma and Lava Major Volcanic Zones Types of Eruptions Types of Volcanoes Famous Volcanoes 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

Magma is called this when it reaches the earth’s surface.

What is lava?

Any movement of magma towards the Earth’s surface is called this.

What is volcanism?

This describes the “thickness” of lava.

What is viscosity?

This lava contains large quantities of magnesium and iron.

What is Mafic lava?

This lava contains large quantities of feldspar and silica.

What is felsic Lava?

The plate boundary surrounding the Pacific Oceans where many active volcanoes are located.

What is the Ring of Fire?

Divergent plates under the ocean where volcanoes are formed.

What is a mid-ocean ridge?

A convergent boundary where volcanoes are formed.

What is a subduction zone?

These volcanoes are not located at plate boundaries.

What are hot spot volcanoes?

A hot spot volcano created this state.

What is Hawaii?

Viscous lava which contains large quantities of this creates explosive eruptions.

What is gas?

This thin, fluid lava, named for its ropey appearance, is formed by hot, fluid eruptions.

What is pahoehoe?

This lava, whose name means “hard on the feet,” is created by eruptions with a high gas content.

What is aa?

These fragments of rock ash and gas create dangerous eruptions.

What is pyroclastic material?

This pyroclastic material is Latin for “little stones.”

What is lapilli

This volcano is typically small, and has very steep sides This volcano is typically small, and has very steep sides. It is formed by explosive eruptions of pyroclastic material.

What is a cinder cone volcano?

This volcano is created by alternating layers of lava and pyroclastic materials.

What is a stratovolcano or composite volcano?

This volcanic depression is created when a magma chamber empties and the ground above collapses.

What is a caldera?

This volcano is formed from flows of low viscosity lava which travels great distances before it cools.

What is a shield volcano?

This volcanic feature vents steam, not lava.

What is a fumerole?

This famous volcano destroyed the city of Pompeii.

What is Mt Vesuvius?

This caldera volcano became the world’s first national park.

What is Yellowstone?

This famous volcano in the South Pacific exploded in 1883 with the loudest sound ever recorded. The violent eruption was heard over 1900 miles away an created a caldera over three miles across.

What is Krakatoa?

This volcano threatens over 3 million people in the Seattle, WA area.

What is Mt Rainier?

This volcano, helped initiate Nemo in to the “Fraternal bonds of Tankhood”

What is Mount Wannahockaloogie?