Show:
Volcanoes and Plate Tectonics
Properties of Magma
Volcanic Eruptions
Volcanic Landforms
Geothermal Activity
100
This is the name for magma when it reaches the Earth's surface.
What is lava?
100
This is the name for hot, fast moving lava.
What is pahoehoe?
100
This may form around the top of a volcano.
What is a crater?
100
These form from ash, cinders and bombs erupting explosively.
What are cinder cone volcanoes?
100
These two words mean "Earth" and "heat" in Greek.
What are geo and thermal?
200
Volcanic belts form along these.
What are plate boundaries?
200
Silica is formed by these two elements.
What are silicon and oxygen?
200
Lava with low viscosity causes this type of eruption.
What is a quiet eruption?
200
Quiet and explosive, these volcanoes form layers of lava and ash.
What composite (or strato-) volcanoes?
200
This is a fountain of steam and water that erupts from the ground.
What is a geyser?
300
The Ring of Fire is located around this ocean.
What is the Pacific Ocean?
300
These three factors determine the viscosity of magma.
What are temperature, friction and silica content?
300
This pushes magma from the magma chamber up the pipe.
What is the force of expanding gases?
300
These five features are formed by magma.
What are volcanic necks, dikes, sills, batholiths and dome mountains?
300
These are two types of geothermal activity.
What are geysers and hot springs.
400
Hawaii was formed by this.
What is a hot spot?
400
This kind of rock is formed from low silica content lava.
What is basalt?
400
Lava that cools quickly and has high silica content produces this kind of rock.
What is obsidian?
400
This is is formed after the crust above the hardened magma chamber wears away.
What is a batholith?
400
This forms when underground magma heats underground water.
What is a hot spring?
500
This is formed by the subduction of an oceanic plate.
What is a volcano?
500
This rock is formed by light colored lava.
What is rhyolite?
500
This occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders and bombs.
What is a pyroclastic flow?
500
This is formed by many layers of thin, runny lava erupting out of long cracks in the ground.
What is a lava plateau?
500
These two things can be found in hot springs.
What gases and other dissolved substances?