A volcanic belt formed by many volcanoes that rim the Pacific Ocean.
What is the Ring of Fire?
100
The resistance of a liquid to flowing.
What is viscosity?
100
Magma moves through a ong tube in the ground that connects the magma chamber to Earth's surface.
What is a pipe?
100
Tall cone shaped mountains in which layers of lave alternate with layers of ash
What Composite volcanoes?
100
A volcano that erupts explosively and has magma high in silica.
What is an explosive eruption?
200
A string of islands formed by the volcanoes along a deep-ocean trench.
What is an island arc?
200
The viscosity of magma depends on these two things.
What is silica content and temperature?
200
Molten rock and gas leave the volcano through an opening on the side of the volcano.
What is a side vent?
200
High level areas that are formed from eruptions of lava.
What are lava plateaus?
200
An eruption that hurls out a mixture of hot gases, ash cinders and bombs.
What is pyroclastic flow?
300
A volcano forms above this place, when magma erupts through the crust and reaches the surface
What is a hot spot?
300
The amount of this substance in magma helps to determine its viscosity.
What is silica?
300
A volcano that erupts quietly and has magma low in silica.
What is a quiet eruption?
300
A fountain of water and steam that erupts from the ground. Old Faithful in Yellowstone National Park is an example.
What is a geyser?
300
A volcano that his high viscosity and produces ash, cinders and bombs. These materials build up around the vent ina steep , cone shaped hill.
What is a cinder cone volcano?
400
The formation of the Hawaiian islands is an example of this.
What is a volcano forming over a hot spot?
400
High levels of silica create magma with this this kind of viscosity.
What is high viscosity?
400
When a volcano erupts, the force of this pushes the magma from the magma chamber through the pipe until it flows or explodes out of the vent.
What is the force of expanding gases?
400
Volcanic necks, dikes, sills, batholiths and dome mountains.
What are landforms created by the magma that is able to force its way through the cracks in the upper crust of the earth, but fail to reach the surface?
400
Layers of lava pour out of a vent and harden on top of previous layers. There lava flows build a wide, gently slping mountain.
What is a shield volcano?
500
A molten mixture of rock-forming substances, gases, and water from the mantle.
What is magma?
500
Hot, fast moving lava, and cooler and slower-moving lava.
What is pahoehoe and aa?
500
Active, dormant or extinct?
What are the terms used to describe the life cycle of a volcano?
500
Geysers and hot springs are examples of this kind of activity and are often found in areas of present or past volcanic activity.
What is geothermal activity?
500
A huge hole that is left by the collapse of a volcanic mountain. the hole contains pieces of the volcano that have fallen inward, as well as some lava and ash.