Volcano Review

The less silica that magma contains, the thicker the magma is. 

A volcanic neck forms when magma hardens in a volcano's ________.

California's faults, volcanoes, mountain ranges, and basins were created by ___________.

Quiet eruptions gradually build up a gently sloping volcanic mountain called a shield volcano.

An extinct or dead volcanoe is unlikely to erupt again.

A molten mixture of rock-forming substances, gases, and water found in the mantle is called

A string of islands created by volcanoes  is called

An area where material from within the mantle rises and melts, forming magma is called a(n)

A wide, gently sloping mountain made of hardened layers of low-silica lava is called a ______.

Pahoehoe and aa are produced during _______________ eruptions.

Lava plateaus are made up of cool/hardened layers of thin,runny lava that flows over an area.

Volcanic soils are fertile and good for farming because it contains __________.

A dormant volcano may be expected to awaken in the future and become active. 

What is formed when plate movements cause the crust to bend downward?

A weak spot in the crust where magma comes through is a(n) __________.

During a volcanic eruption, magma moves from a chamber through a long tunnel called a tube.

Characteristics of an explosive eruption include __________

Ash, cinders, and bombs erupt explosively to form _______________ volcanoes.

Liquid magma flows upward through the crust because it is LESS dense than the solid material. 

Volcanoes which alternate with quiet and explosive eruptions are called _____.

Major island arcs include 

A mass of rock that formed when a large body of magma cooled inside the Earth's crust is called

Ring of Fire is 

A hot spring is hot water and steam that erupts from the ground.

A pyroclastic flow is an explosive eruption that hurls out hot gases, ash, cinders and bombs.