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Plate Tectonics
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PRESENTATION OUTLINE
1.
PLATE TECTONICS
The theory that pieces of Earths crust moves driven by the convection currents in the mantle
2.
CONVECTION CURRENTS
The movement of a fluid caused by differences in temperature that transfers heat from one part of the fluid to another
3.
SLAB PULL
The portion of motion of a tectonic plate that can be accounted for by its subduction
4.
RIDGE PUSH
When a Mid-Ocean Ridge forms it pushes lower level sea Floor creating a ridge push
5.
DIVERGENT PLATE BOUNDARY
Two tectonic plates that move away from each other
The direction of plates is that they move away from each other
6.
DIVERGENT
On land divergent plate boundaries form rift valleys
7.
OCEANIC DIVERGENT PLATES
In the ocean, divergent plate boundaries form mid ocean ridges
8.
CONVERGENT PLATE BOUNDARY
When two plates move towards each other and crash
The direction of the plates is that they move towards each other until they crash and form a landform
9.
OCEANIC VS CONTINENTAL CRUST
When ocean and continental crust coverage they form volcanic arcs like Mt Saint Helens
Photo by
brewbooks
10.
OCEANIC VS OCEANIC CRUST
When ocean and ocean crust coverage they form a volcanic island arc like the islands that make up Japan
11.
CONTINENTAL VS CONTINENTAL
When continental crust coverages with continental crust converge it forms mountains like Mt. Everest
Photo by
watchsmart
12.
SUBDUCTION ZONE
When two plates collide and one plate goes underneath the other it's called a subduction zone
13.
DEEP OCEAN TRENCH
A deep valley along the ocean floor beneath which oceanic crust slowly sinks towards the mantle
An example is the Mariana Trench
14.
TRANSFORM PLATE BOUNDARY
It's also known as the conservative plate boundary because it neither creates or destroyed lithosphere
The directions of the plates go horizontal or vertical
15.
TRANSFORM PLATES
When plates move along transform boundaries they form earthquakes
Photo by
digitalsadhu
16.
SAN ANDREAS FAULT LINE
An example of a transform boundary is the San Andreas Fault line in California
17.
WHAT ARE HOT SPOTS
Hot spots are when heat from the mantle rises and goes into the volcano. These hot spots are generated by melting rock
18.
HOT SPOT EXAMPLE
An example where a hot spot is in the islands of Hawaii
19.
EXPLANATION
Hot spots help plate tectonics because hot spots form magma which sinks into the mantle forming a convection current
Photo by
Karlbert
20.
OCEAN VENTS
Ocean vents are when hot toxic, fluids and gases come out of them. They are usually found near active volcanoes
Generally found in Mid-ocean ridges
An example is by the Galápagos Islands
21.
HOW DO OCEAN VENTS HELP PLATE TECTONICS
Since they are like hot springs or geysers they melt rock and that sinks into the mantle creating a convection current
Bernard Pasalic
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