The Restless Earth Definitions

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  • Created by: 09Butcher
  • Created on: 22-04-14 12:51
Destructive
Dense oceanic crust is subducted underneath lighter continental crust. Great pressure casuses severe earthquakes. The oceanic crust melts and causes violent volcanic eruptions.
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Constructive
Plates move apart underneath the ocean and new land is formed as magma forces its way to the surface to form volcanoes, e.g.: Iceland.
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Conservative
Plates slide past each other at slightly different speeds and slightly different angles, but generally in the same direction. Pressure builds up and when released cause earthquakes. Crust is neither destroyed nor made.
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Collision
Two continental plates meet each other and collide, causing earthquakes and fold mountains.
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Composite Volcanoes
Steepsided volcanoes that are made up of a variety pf materials, such as lava and ash. Infrequent but often violent eruptions e.g.: Mount St Helens. Steep slopes and narrow base. Maybe has a secondary cone. Layers of thick, viscious lava and ash.
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Shield Volcanoes
Broad volcanoes mostly made up of lava. Frequent and non-violent eruptions. Wide base and gentle slopes. Low, rounded peak. Layers of runny lava with little ash.
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Supervolcanoes
A mega colossal volcano that erupts at least 1,000km3 of material.
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Fold Mountains
Large mountain ranges where rock layers have been crumpled as they have been forced together, e.g.: The Andes. Occur at destructive and collision margins.
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Ocean Trenches
Deep sections of ocean, usually where an oceanic plate is sinking below a continental plate.
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Earthquakes
A sudden and breif period of intense ground shaking.
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Other cards in this set

Card 2

Front

Plates move apart underneath the ocean and new land is formed as magma forces its way to the surface to form volcanoes, e.g.: Iceland.

Back

Constructive

Card 3

Front

Plates slide past each other at slightly different speeds and slightly different angles, but generally in the same direction. Pressure builds up and when released cause earthquakes. Crust is neither destroyed nor made.

Back

Preview of the back of card 3

Card 4

Front

Two continental plates meet each other and collide, causing earthquakes and fold mountains.

Back

Preview of the back of card 4

Card 5

Front

Steepsided volcanoes that are made up of a variety pf materials, such as lava and ash. Infrequent but often violent eruptions e.g.: Mount St Helens. Steep slopes and narrow base. Maybe has a secondary cone. Layers of thick, viscious lava and ash.

Back

Preview of the back of card 5
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