Revision sa1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Crust | Material beneath the ocean and continents
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| Core | Most inner part of the Earth. Iron and nickel
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| Mantle | Semi molten rock and magma. Beneath the crust
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| Lithosphere | Upper part to the mantle
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| Asthenosphere | Below the lithosphere, Plates lay on it
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| Sial | Made from silica and aluminium, Oceanic
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| Sima | Made from silica and magnesium, Continental
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| Plates | Collide, separate and grind by one another. Floats on top of asthenosphere
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| Convection currents | Allows the plates to move, currents in the mantle caused by the heat of the core
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| Divergent boundary | Constructive, when plates move away from each other
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| Convergent boundary | Destructive, two plates collide with each other, Subduction can occur
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| Transform boundary | Plates move along side one an other at different speeds
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| Subduction | When one plate is sunk beneath another one due to the heavier plate being pushed on top by convection currents
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| Fault line | Where two plates meet each other
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| Active volcano | Erupts regularly
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| Dormant volcano | Has not erupted in 100s of years
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| Extinct volcano | Has never erupted in historical times
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| Vent | Opening of the earths surface
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| Crater | Opening of the volcano
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| Basic lava | Low in silica, Runny
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| Acidic lava | High in silica, Thick like honey
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| Lahar | Mud flow cause when lava melts snow off a mountain
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| Intrusive | Underneath the surface
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| Extrusive | Above the surface
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| Hot spot | Areas of mantle under the crust, Like a blister
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| Fissure | Long crack in the crust
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| Laccolith | Intrusive, dome-like structure
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| Sill | Horizontal sheets of volcanic rock that cooled beneath the crust
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| Dyke | Thin vertical sheets of volcanic rock that runs parallel to rock strata
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| Focus | Where earthquakes occur
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| Epicentre | Above the focus
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| Tsunami | Giant wave caused by an earthquake beneath the ocean
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Created by:
daphandrea
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