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Earth Science Unit
Science 10
Ms Yu
Name:________________
PLATE TECTONICS
QUICK REVIEW
Lithosphere
Asthenosphere
Plate Tectonics
 ________________________________move around ______________on the
_________________________________________

At ___________________________ (where the plate meet), plates interact in
many ways
E.g. __________________ (Bump into each other), ____________________(Go
away from each other), _________________________________________,
______________________________________________________________
Theory of Continental Drift
Background Information
 Developed by________________________________________________

Continents have not always been at the present position, but __________
___________________________________________________________
___________________________________________________________

All continents joint together to form _______________________________

Since Earth was formed, _______________________________________
___________________________________________________________
___________________________________________________________

Pangaea
o “pan”=all ; “Gaea”= World
o ____________________________________________________
o Formed ______________________________________________
o Started pulling part _____________________________________
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Evidence for Continental Drift
1. The Jigsaw Fits
3. Fossil Evidence
2. Matching Geological Structures &
Rocks
4. Glacier Evidence
Wegner’s Conclusion
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Theory of Plate Tectonics
The major problem of Wegener’s theory of continental drift is that ____________
________________________________________________________________
The Mid-Atlantic Ridge- Solving the mystery of Continental Drift
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Plate Boundaries
Tectonic plates flow around due to ____________________________________
________________________________________________________________
____________________material deep in
the mantle create areas with magma that
are hotter (also less dense).
This radioactive magma rise to surface
and force plates apart
Surface magma cools (more dense) and
return to the deep mantle
There are 3 types of plate boundaries:
1. DIVERGENT PLATE BOUNDARIES
 Plates move ______________________ from each other
 Magma rises ______________________________  Magma cools
and _____________________________________________________
 Divergent plates form _______________________________________
(which are big gaps between tectonics plates that are filled with magma)
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2. CONVERGENT PLATE BOUNDARIES
There are 3 subtypes of convergent plates boundaries.
Note:
Oceanic plates are MORE DENSE
Continental plates are LESS DENSE
a) Oceanic-Continental Collision
 _______________________________________ is the point where the
________________ plate slides underneath the _____________ plate
because it is _____________________________________________.
 Extra material from subduction plate is _________________________.
 _________________________ is formed.
 Can also cause ____________________, ______________________,
and _______________________________________________.
 ____________________________ also occurs at the subduction zone
where the plate that is subducting is ___________________________
__________________________________________________________.
_________________ adds to the force from _______________________.
b) Oceanic-Oceanic Collision
 __________________________ will also occur where one oceanic
plate will be forced under another.
 Form ____________________, and ___________________________
(chains of islands in the ocean formed from convergent plates collisions)
 Examples of island arc are ________________& _________________
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c) Continental-Continental Collision
 Plates ________________, _________________, and ____________.
 The force behind __________________________________________.
 An example of a mountain formed by continental-continental collision is
________________________________________________________.
3. TRANSFORM PLATE BOUNDARIES
 Plates ____________________________ one another ____________
________________________________________________________.
 Can produce _____________________________________________.
 A nearby example is the ____________________________________
in ______________________________________________________.
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