Cambridge IGCSE Geography 08 - Plate Tectonics
Terms in this set (33)
The upper part of the Earth's mantle, where the rocks are more fluid.
Collision plate boundary
A plate boundary which two continental plates move towards each other
A cone-shaped volcano formed of alternating layers of lava and ash, with viscous lava and violent eruptions, formed at destructive plate boundaries
Conservative plate boundary
A plate boundary where two plates slide past each other and no crust is destroyed or created.
The part of the crust dominated by less dense granitic rocks, found under land.
Circulating movements of magma in the mantle caused by heat from the Earth core
The central part of the Earth, mostly composed of iron and nickel
Destructive plate boundary
a plate boundary where a continental plate and an oceanic plate move towards each other. The oceanic plate is subducted, and an oceanic trench and volcanoes are formed.
The centre of an earthquake on the surface of the Earth, above the focus
The removal of people, generally in an attempt to avoid a disaster
The centre of an earthquake below the ground.
The size of an earthquake
The layer of the earth below the crust, made of semi-molten rock
Altering building design to reduce the impact of a natural disaster
The part of the crust dominated by denser basaltic rocks, found under seas and oceans
The line between two tectonic plates
Forecasting future changes
The process of getting ready for an event and planning how to deal with it
The process that occurred at the creation of the Earth that releases heat at the Earth's core
The way in which people react to a natural hazard
The system used to measure earthquake strength. A logarithmic scale from 0-10
The machine used to measure earthquake intensity
A shallow-sided volcano with regular, gentle eruptions found at constructive plate boundaries
Help and aid provided to an area to prevent immediate loss of life because of shortages of basics, such as water, food and shelter
The process by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge
Threats posed by earthquakes, volcanoes and other crustal processes
Very small fragments of rock and lava that are produced by a volcanic eruption and ejected into the air.
The rigid outer layer of the Earth consisting of the crust and upper mantle
Constructive plate boundary
A plate boundary where two plates move away from each other, magma rises up to fill the gap and new crust is created
Liquid rock from a volcano on the surface of the Earth
A fast moving current of hot gas and ash erupted from a volcano
A destructive mud flow of soil, ash and water, often caused when an eruption volcano melts snow and ice
Waves of energy that travel through the Earth, generated by earthquakes and volcanos
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