Section 8.3 (Assigned:________________Due:_______________)
____Read pages 167 – 172 in your text.
____Complete the study session.
____Add the 4 vocabulary words and definitions.
____Complete the thinking map using the information on plate boundaries.
____Use the additional page containing the 7 continents. Assemble and label them in the area
provided to represent Earth 245 million years ago.
____Answer questions 1 – 6 in Section Review page 173. You MUST answer using complete
sentences. Your work MUST be neat and legible.
Study Session:
I.
II.
III.
Moving plates
A. Three types of plate boundaries are __________________________________,
_____________________________, and _______________________________.
B. Earth’s surface is covered with____________________________________.
C. Plates move apart at ___________________boundaries, _______________ at
convergent boundaries, and slide by each other at ______________________
boundaries.
Divergent boundaries
A. Divergent boundaries are found in the ocean as _________________________.
B. This type of boundary is found over the rising plume of a
___________________________________________.
C. The convection cell causes the two plates to _____________________________.
D. As they move, ______________________________ fills the space created by
their motion.
E. The melted rock hardens and becomes ____________________________.
F. Divergent boundaries can also be found on continents as
______________________________________.
G. When a rift valley forms on land, it may split the landmass wide enough so that
the ____________________________________________.
H. When this happens, the rift valley becomes a ___________________________.
Convergent boundaries
A. When oceanic plates collide, one __________________under the other forming
a valley in the ocean floor called a _________________________.
B. A __________________plate subducts under a less dense one.
C. ________________________are cooler plates, are denser than younger plates,
and tend to subduct under younger plates.
IV.
V.
D. When an oceanic plate and a continental plate collide, the oceanic plate must
subduct under the continental plate because ____________________________
_________________________________________________________________
Mountains and convergent boundaries
A. When two continents collide vast __________________________are formed.
B. Today the ______________________Mountains are the result of the collision of
the Indo-Australian oceanic plate and the Eurasian continental plate.
Transform fault boundaries
A. Mid-ocean ridges and continental rift valleys are ______________________
boundaries.
B. Trenches and mountain ranges are __________________________boundaries.
C. ______________________________boundaries are more difficult to find
because they leave few clues to indicate their presence.
D. Transform faults can be thought of as a zone of ________________ rather than a
line separating two plates.
E. Sometimes the action of a transform fault will form a ________________ along
the line of movement.
F. The best way to detect transform faults is by the ____________________ they
cause.
G. The ___________________________ is a well-known fault in California that is
the boundary between two lithospheric plates- the ____________________
Plate and the ___________________________Plate.
Vocabulary words:
1. ______________________________:
________________________________________________________________________
________________________________________________________________________
2. ______________________________:
________________________________________________________________________
________________________________________________________________________
3. ______________________________:
________________________________________________________________________
________________________________________________________________________
4. ______________________________:
________________________________________________________________________
________________________________________________________________________
Section Review:
1. ________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
2. ________________________________________________________________________
________________________________________________________________________
3. ________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
4. ________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
5. ________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
6. ________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Thinking Map:
Plate Boundaries