Volcanoe Review

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

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

Characteristics of an explosive eruption include __________

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

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

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

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

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

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

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

Pahoehoe and aa are produced during _______________ eruptions.

Ring of Fire is 

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

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

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

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

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

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

Major island arcs include 

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

A string of islands created by volcanoes  is called

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

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

An extinct or dead volcanoe is unlikely to erupt again.

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