Plate Tectonics

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Plate Tectonics

• Chapter 17

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Continental Drift
_________ proposed the theory that the crustal
plates are moving over the mantle. This was
supported by fossil and rock type evidence also
matching of coastline shapes.
Wegener
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Convection Currents
The force responsible for plate movement is
__________.
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Plate Boundaries

• The following two slides show maps of the current
  major plate boundaries and their relative
  motions.
• You should be able to describe various landforms
  created by different plate movements.

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Plate Boundaries

• Divergent Boundary moving _____
• Convergent Boundary moving ________
• Transform Fault Boundary moving
  ________________________

apart
together
sideways past each other
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Divergent boundary of two continental
plates. Creates a __________. Example
_____________
rift valley
East African Rift
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Convergent boundary of two oceanic
plates. Creates an ________ and a _____.
Example _____
island arc
trench
Japan
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Convergent boundary of an oceanic plate and a
continental plate. Forms a _______ mountain range
and a ______. Examples _______ or _______ Mts
volcanic
trench
Andes
Cascades
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Convergent boundary of two continental plates.
Forms a ______ mountain range. Examples
___________, Alps, ______________
Himalayas
folded
Appalachians
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Transform-fault boundary where the North American
and Pacific plates are moving ____ each
other. Example ________________ in California
past
San Andreas Fault
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Plate Boundaries Review

• Places where plates move apart are called
  _____________ boundaries.
• When continental plates diverge a ___________ is
  formed.
• When two oceanic plates converge what is created?
  _________________
• The Appalachians formed mainly from continental
  plate collisions and therefore are a __________
  mountain range.
• The force moving the plates is ____________ .

divergent
rift valley
an island arc and a trench
folded
Convection currents