PRESENTATION OUTLINE
PLATE TECTONICS
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a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates that move slowly over the underlyin
CONVECTION CURRENTS
- The transfer of heat through a fluid
SLAB PULL
- Gravity pulling down a tectonic plate
Ridge push-when magma pushes apart two plates.
DIVERGENT PLATE BOUNDARY-when two plate move apart from each other.
On land Divergent plate boundaries form rift valleys surrounded by two ridges.
In the ocean they form mid-ocean ridges.
Convergent plate boundaries is when two plates crash together.
When ocean and continental crust converge they form volcanic arcs such as the Andes.
When ocean and ocean crust converge they form island arcs such as Japan.
When continental and continental crust converge they form uplifted mountains such as the Himalayas
Subduction zone is where the deep ocean trench is and the plate sinks under the other plate.
Deep ocean trench is when one plate sinks under the other one and forms a trench
Transform plate boundaries are where two plates slide past each other.
When the plates slide past each other they cause earthquakes
An example of this is the San Andreas Fault.
