restless earth key words

collection of key words for gcse geography revision

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Tectonic Plates

tectonic plates are huge pieces of rock formed from the earths crust.

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Collision Zone

the area where Tectonic plates collide

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Subduction Zone

An area of Tectonic plate collision where the heavier plate will subduct or follow a path underneath the less dense plate.

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Mantle

the widest section of the earth, it i smade up of semi-molten rock called magma, in the upper parts of the mantle the rock is hard but lower down the rock is soft and begining to melt.

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Richter Scale

used to measure the magnitude of an earthquake and the amount of energy it released.

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Mercalli Scale

a scale used to measure the intensity of an earthquake

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Primary effects

the immediate effects of the disaster e.g. buildings collapsing, roads cracking, bridges giving away.

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Secondary Effects

the effects that result from the primary effects e.g. homelessness, businesses going bankrupt, an dfires due to explosion of escaping gas from cracked pipes.

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Lava

molten rock expelled from a volcano during an eruption and the resulting rock after solidification and cooling.

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Magma

hot liquified rock located deep below the earth's surface.

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Hot Spot

fixed places within the mantle or oceanic lithosphere where rocks melt to generate magma. When a Hot spot is located in the oceanic lithosphere a class of volcanoes called sheild volcanoes are built.

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Pacific ring of fire

an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific ocean.

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Geothermal Energy

heat from within the earth, we can recover this heat or steam or hot water and use it to heat buildings or generate electricity. it is a renewable enegry source because the heat is continuously produced inside the earth.

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Focus

the 'hypocentre' of an earthquake, the point in the earth where the earthquake rupture or fault movement actually occurred.

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Epicentre

the point on the earth's surface directly above the focus of an earthquake.

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Seismograph

a device that scientists use to measure earthquakes, the goal is to accuratly record the motion of the ground during a quake.

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Comments

:) PurpleJaguar (: - Team GR

Thanks for these notes :P

Thegirlwhoknewtoomuch - Team GR

Thanks for this ;)

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