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What is the defintion of crust?
The outer layer of the earth.
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What is the defintion of a plate?
A section of the earth's crust.
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What is the defintion of plate margin?
The boundary where two plates meet.
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What is the defintion of mantle?
The dense, mostle solid layer between the outer core and the crust.
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What is the defintion of convection currents?
The circular current of heat in the mantle.
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What is the definition of constructive?
Where two plates are moving apart.
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What is the definition of destructive?
Where the plates collide.
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What is the definition of conservative?
Where the plates are sliding past each other.
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What is the definition of oceanic crust?
The plate covered by water.
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What is the definition of continental crust?
The crust which is know are land. Land masses.
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What is the definition of subduction?
The sinking of the oceanic crust at a destructive plate margin.
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What is the definition of collision?
The meeting of two plates of continental crust.
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What is the definition of fold mountains?
When 2 continental plates push together, they push upwards forming plate mountains.
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What is the definition of ocean trenches?
As a plate sinks below another, it creates a deep-sea trench.
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What is the definition of geosyncline?
A depression in the crust.
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What is the definition of syncline?
Dip in the mountain.
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What is the definition of anticline?
Peek of the mountain.
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What is the definition of a magma chamber?
Magma within the earths crust beneath the volcano.
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What is the definition of the main vent?
Point in the earths crust where hot magma has reached the surface.
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What is the definition of the secondary vent?
Fault in the volcano structure.
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What is the definition of the crater?
Hole in the crust where magma comes through.
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What is the definition of the secondary cone?
Mini volcano forms of the surface of the vocalno around the secondary vent.
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What is the definition of volcanic bombs?
Magma which cools as it moves through the air.
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What is the definition of pyroclastic flow?
Fast moving, destructive torrents of hot ash, rocks, gasses and steam from a volcano.
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What is the definition of an ash cloud?
Steam and ash makes ash clouds.
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What is the definition of a composit volcano?
Steep sided volcano, made up of alternate layers of ash and lava. Lava is sticky and acidic so eruptions are violent and infrequent. Found at a destructive plate boundaries.
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What is the definition of a sheild volcano?
Wide base and gentle sloping sides. Lava is basic and thin. Eruptions are frequent but not violent. Found at constructive plate boundaries.
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What is the definition of a focus?
Where the earthquake occurs in the crust.
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What is the definition of a epicentre?
Where the earthquake hits the earth's surface directly above the focus.
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What is the definition of shock waves?
Pulses created by the earthquake that are sent out in all directions.
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What is the definition of the richter scales?
Measures the magnitude of an earthquake.
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What is the definition of the mercalli scale?
Measure the effects of the earthquake. Measured using observations.
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Other cards in this set

Card 2

Front

A section of the earth's crust.

Back

What is the defintion of a plate?

Card 3

Front

The boundary where two plates meet.

Back

Preview of the back of card 3

Card 4

Front

The dense, mostle solid layer between the outer core and the crust.

Back

Preview of the back of card 4

Card 5

Front

The circular current of heat in the mantle.

Back

Preview of the back of card 5
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