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Sequence of Lesson for
Transform Plate Boundaries
1.
Learning Objectives
Preclass video: Students view Transform Plate Boundaries and answer
related questions in an online quiz (for example see
https://geosciencevideos.files.wordpress.com/2015/06/transformboundaries_quiz.pdf).
2.
Class begins with a review of learning objectives from video and class
lesson (slide 2).
3.
Students answer short answer questions (e.g., slides 3,4) related to video
and prior lesson content (slides 5,6).
The video covers much of the information related to transform
boundaries. We typically present a couple of review slides and move on
to discussions of rates of plate motions, supercontinent cycles, and the
tectonic evolution of North America. (As an alternative, we sometimes
assign our Rates of Plate Motion video.) Even after several plate tectonic
lectures, students often begin with misconceptions about how a
continent is formed (see slide 7 exploration question).
Class ends with a reflection exercise (slide 8) that can be completed later
and review of the day’s learning objectives.
1
4.
5.
LO: I can identify examples of transform plate boundaries around the world.
3
4
2
5
A.
B.
C.
D.
E.
Learning Objectives of the Related Class Lesson
1. I can explain what the world looked like before the
formation of Pangaea.
2. I can describe the characteristics and tectonic evolution
of the North American continent.
3. I can describe the concept of terranes and use it to
explain the geologic history of North Carolina.
2
LO: I can describe the physical features and geological processes at a transform plate boundary.
Examine the idealized maps that shows the
location of two segments of oceanic ridge
separated by a transform plate boundary.
Which map shows the correct orientation
of plate motions?
Which location(s) represent(s) a transform
plate boundary?
1
Learning Objectives of the Video Transform Plate
Boundaries
1. I can identify examples of transform plate boundaries
around the world.
2. I can describe the physical features and geological
processes at a transform plate boundary.
1 only
2 and 3
3 only
2 and 4
5 only
1
3
2
4
1. 1
2. 2
3. 3
4. 4
3
Review Question
4
Review Question
How many statements in this paragraph are false?
Which boundary diagram best
represents the plate boundary
configuration at location #4?
A. a
B. b
C. c
D. d
5
Divergent plate boundaries are characterized
by oceanic trenches and are located toward
the center of most ocean basins. An oceanic
ridge would have the youngest ocean floor in
a typical ocean basin. As the oceanic
lithosphere spreads away from the divergent
boundary, the age of rocks on the ocean floor
get older and older. Oceanic lithosphere is
another name for the rocks of the oceanic
crust that were formed by magma from
Earth’s interior. Oceanic trenches are present
at convergent boundaries, adjacent to active
continental margins. The oceanic crust here is
at its oldest age before being destroyed as it
descends into the mantle.
A. 2
B. 3
C. 4
D. 5
6
1
LO: I can describe the characteristics and tectonic evolution of the North American continent.
Reflection Exercise
What are the origins of North America?
A.
Plate tectonic processes have moved the lithosphere that makes up North
America (NA) around Earth’s surface. While it has undergone some
changes, NA has been approximately the same size as today for the last
billion years. Sometimes it has combined with other landmasses to form a
supercontinent, at other times, it has been separate (like today).
B.
North America has been assembled from several separate pieces over
geologic time as a result of plate tectonics. The continent has grown from an
original slab of lithosphere that has remained in approximately this location
for the last billion years. Continents were smaller in the geologic past and
have grown as continental crust has been formed by plate tectonics and
added to the original slabs of lithosphere.
C.
1. Look over your notes and create a timeline
for the evolution of the North American
continent.
2. Answer the following:
a) What was the most interesting thing you learned
today?
b) What remains the most confusing concept?
Plate tectonic processes have brought together several separate pieces of
lithosphere to assemble North America over the last billion years. Most of
the rocks that make up the continent today were in different land masses in
the past. Sometimes these pieces were part of supercontinents, at other
times they were individual pieces of continental or oceanic lithosphere.
7
8
2