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Plate Tectonics by Mind Map: Plate Tectonics
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Plate Tectonics

This is just a demo map that you can delete right away, if you feel like it...

Layers of the earth


Outer Core

Inner Core


Plate Boundaries


Two plates are moving apart

Mid Atlantic ridge

Causes, Earthquakes, Volcanos, Rift valley is formed


Where plates are slipping and sliding past eachother

Causes, Volcanos, Earthquakes


Two plates are colliding together

Causes, Fold mountains, Earthquakes


When 2 plates move towards eachother and meet, the heavier oceanic crust sinks below the contiental crust forming a trench

Causes, Earthquakes, Volcanos, Trench, Island Arc, An island arc is a chain of volcanoes which alignment is arc-shaped, and are parallel and close to a boundary between two converging tectonic plates.

Earthquake waves

Primary (P) Wave

Consists of construction and expansion ( pushing/pulling ) wich causes back and fourth motion

Can travel through solids and liquids

Secondary (S) Wave

Move slowly, moves rocks up and down or side to side

Cannot travel through liquid

Surface Love (L) Wave

Most distructive wave because its surface moves like waves

Plate Movement

Plate movement causes

Folding, Process that bends and twists rocks due to compression or squeezing

Faulting, Process where rocks move past each other along a fracture pr crack, occurs where plates are seperating, sliding past, or comming together

Vulcanism, The movement of molten rock or magma, beneath or above earths surface






Nuclear Testing

Likely to occur at plate boundaries

Measuring Quakes

Moment magnitude scale, Measures the amount of energy released in a earthquake

Mercalli Scale, Used for measuring an earthquakes intensity. Measures impat on earths surface, humans, natural and man made structures. On a scale from 1-12


Is the point on the earths surface that is directly above the focus, the point where a earthquake originates


What is a fault

A fault is in the earths surface where moemnt has occurred, and can be meteres to km's long

Types of faults

Normal Fault, When rock is stretched apart or in tension. One side of the fault slips down relative to the other

Reverse Fault, When rock is compressed together one side rises up

Transform Fault, When two plates slide past each other in different directions. Wich create shallow earthquakes

Horst and Graben Fault, Steep sided valley formed when faulting causes a blocked shaped area to drop, Horst : Land that moves upwards, Graben : Land that moves downwards

Convection currents

Continents move because of convection currents in the earths mantle.

Found in the asthenosphere

Upwelling causes plates to move apart

= Divergent plate boundary

Sinking causes plates to pull together

= Convergent plate boundary

Mid-Ocean Ridges

15 km above the ocean floor and 1500-2500 km wide

Sea-floor spreading

Is a process that occurs at Mid-Ocean Ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge

BC's Earthquake Hazard

Off the coast of Vancouver is a convergence of two tectonic plates, which involve the Juan De Fuca plate and the Pacific plate. These 2 plates are subducting and have become stuck. Once they become un stuck the result will be a massive earthquake.