Plate tectonics theory
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Transcript Plate tectonics theory
Plate tectonics
6.E 2.2
Kim Lachler 2011
Plate tectonics theory
The Earth's crust is made up of plates. These
plates have moved throughout Earth's
history.
–
Used to explain the formation of
Mountains
Volcanoes
Earthquakes
Oceans basins
Pangaea
Was when all the
continents where
together 2000 years
ago.
Different theories exist
as to why they spread.
Types of Boundary Movements
1)
Divergent
- moves apart
- when theyhappen in the
ocean –ocean basins
are formed.
Types of Boundary Movements
2) Convergent
- moves together
Where ocean meets land –
can form volcanoes
Where land meets land –
can form mountains
Types of Boundary Movements
3) Transform
- slide past
- most (but not all) are
in ocean basins
Movement
Each plate moves as an individual unit
–
–
Cities located on the same plate stay the
same distance apart.
Cities located on different plates distances
change.
Bibliography
PBS, Intro to Plate Tectonic Theory, http://www.pbs.org/wgbh/aso/tryit/tectonics/intro.html, accessed
10/05/2011
Geology,.com, divergent boundries, http://geology.com/nsta/divergent-plate-boundaries.shtml, accessed
10/05/2011
Geology.com, transform boundries, http://geology.com/nsta/divergent-plate-boundaries.shtml, accessed
10/05/2011
Earth Exploration Tool Kit,Case Study: Investigating Earthquake ActivityPredicting the Next Big One! http://serc.carleton.edu/eet/earthquakes/case_study.html, accessed
10/05/2011