1. Plate Tectonics

2. 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

3. 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.

5. Plate Boundaries Divergent Boundary – moving _______
Convergent Boundary – moving ________
Transform Fault Boundary – moving ________________________
sideways past each other
together
apart

6. Divergent boundary of two continental plates.
Creates a __________. Example: _____________
rift valley
East African Rift

7. Convergent boundary of two oceanic plates.
Creates an ________ and a _____. Example: _____
island arc
trench
Japan

8. Convergent boundary of an oceanic plate and a continental plate
Convergent boundary of an oceanic plate and a continental plate. Forms a _______ mountain range and a ______. Examples: _______ or _______ Mts
volcanic
trench
Andes
Cascades

9. Convergent boundary of two continental plates
Convergent boundary of two continental plates. Forms a ______ mountain range. Examples: ___________, Alps, ______________
Himalayas
folded
Appalachians

10. Transform-fault boundary where the North American and Pacific plates are moving ____ each other.
Example: ________________ in California
past
San Andreas Fault

11. 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