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Volcanoes
Volcanic zones
Types of Eruptions
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100
What is magma?
magma is liquid rock produced under Earth's surface.
100
the Pacific Ring of Fire.
What is the major zone of active volcanoes encircles the Pacific Ocean?
100
The resistance to flow,of magma effects the force with which particular volcano will erupt, it is determined by magma's composition.
What is viscosity?
100
cracks through which lava flows to Earth's surface.
What is a fissure?
200
Magma can form in three conditions what are they?
if the temperature of rock rises above melting point of the minerals the rock is composed of the rock will melt, enough pressure is removed from the rock, addition of fluids such as water, may decrease the melting point of some minerals.
200
area where one tectonic plate moves under another.
What is the subduction zone?
200
large formation of igneous rock and they can vary in size and shape.
What is plutons?
300
What is volcanism?
Any activity that includes the movement of magma onto Earth's surface.
300
What is a major zone of active volcanoes?(where is the location)
The pacific ring of fire in the Pacific ocean
400
What is lava?
lava is magma that flows onto Earth's surface.
400
How does a deep trench form?
It forms on the ocean floor along the edge of the continent where the plate is subducted.
500
a vent or fissure in Earth's surface through which magma and gases are expelled.
what is a volcano?
500
A string of volcanic islands that form over an overriding plate.
What is an island arc?