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Sequence of Lesson for
Divergent Plate Boundaries
1.
Learning Objectives
Preclass video: Students view Divergent Plate Boundaries (or How do you
make an ocean?) and answer related questions in an online quiz (for example
see https://geosciencevideos.files.wordpress.com/2015/06/divergentboundaries_quiz.pdf).
2.
Class begins with a review of learning objectives from video and class
lesson (slide 2) and we revisit concepts from previous lecture.
3.
Students answer one or more short answer questions (e.g., slides 3,4)
related to video and prior lesson content (Tectonic Plates).
4.
Because the video covers much of the formation of a divergent boundary,
we use much of this class to enhance students’ comprehension of the
relationship between tectonic processes and Earth’s features. Instructor
makes presentation on plate configurations, relative motions, and the
formation of an ocean basin. Lesson broken up by conceptests and short
activities (e.g., slides 5,6,7) .
5.
Class ends with a reflection exercise (slide 8, can be completed after class
if necessary) and review of the day’s learning objectives.
Learning Objectives of the Video Divergent Plate
Boundaries (or How do you make an ocean?)
1. I can describe the physical features and geological
processes at a divergent plate boundary.
2. I can explain how ocean basins form and grow
Learning Objectives of the Related Class Lesson
1. I can discuss how plate tectonics differs from continental
drift.
2. I can compare and contrast passive and active
continental margins.
3. I can describe the relative motions of plates at the three
major types of plate boundary.
1
LO: I can describe the physical features and geological processes at a divergent plate boundary
How many of the these boundaries are
examples of divergent plate boundaries?
2
LO: I can describe the physical features and geological processes at a divergent plate boundary
Sketch the approximate locations of the major
plate boundaries on the map. Add the plate names.
A. Nazca and South American plates
B. Indian-Australian plate and Antarctica plate
C. Pacific plate and Eurasian plate
D. African plate and South American plate
E. North American and Eurasian plate
F. Nazca plate and Pacific plate
3
LO: I can describe the physical features and geological processes at a divergent plate boundary
Read the partial or complete sentence
below and . . .
Divergent plate boundaries are typically
characterized by oceanic
. . circle the appropriate term.
ridges
trenches
Earthquakes are associated with divergent plate
boundaries
True
False
Most active volcanoes are found along divergent
plate boundaries
True
False
What is the source of magma that forms at
oceanic ridges?
Melting of
lithosphere
Melting of
asthenosphere
Divergent plate boundaries initially form by
breaking apart
Old, cold oceanic
lithosphere
Continental
lithosphere
Raleigh is moving _________ a divergent
boundary in the Atlantic Ocean
away from
toward
How many plates are associated with a typical
divergent plate boundary
Oceanic ridges are found
one
two
In all ocean basins
Only in the
Atlantic and
Pacific oceans
4
LO: I can describe the physical features and geological processes at a divergent plate boundary
Which of the locations on the map all represent
examples of divergent plate boundaries?
A.
B.
C.
D.
E.
1, 6, 8
3, 4, 5
2, 7, 9
1, 5, 6
3, 7, 9
1
LO: I can describe the physical features and geological processes at a divergent plate boundary
Reflection Exercise
Draw a labeled sketch to show the physical
features and geological processes
associated with an oceanic ridge
1. Look over your notes and sketch and label
a diagram that illustrates the formation of a
mature ocean basin
2. Answer the following:
a) What was the most interesting thing you learned
today?
b) What remains the most confusing concept?
7
8
2