Transcript Think-pair

Divergent Boundary
Prediction
Predict what type of movement occurs at a
divergent boundary.
 Write this prediction at the top of your next
blank page.
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Green cards = front left corner
Red cards = front right corner
Blue cards = back left corner
Yellow cards = back right corner
2 min to share!
Divergent DEMO
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Draw table below on
blank notebook page:
What I …
..used…
…did…
…happened…
Observations
Divergent demo
What did you do?
 What did you notice?
 What was this demo supposed to show?
 Was your prediction correct? Explain!
 Green cards pair up with red cards
 Yellow cards pair up with blue cards!
 2 min to discuss your results!
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Divergent Demo
What is inside this candy bar?
 What does each ingredient in the candy
bar represent?
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 Think
about what moves in a boundary…
 Chocolate = Earth’s Plates (crust and
lithosphere)
 Carmel = asthenosphere
 Was this a good or bad model? Why?
Divergent Boundaries
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Think-pair-share Based
on the demo, predict what kind of movement
occurs.
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In your own words: Discuss with a partner:
What is a fault?
 Break
in the rock of the crust where rock surfaces slip
past each other.
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What type of fault occurs?
 Here
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are your choices:
Normal
Reverse
Strike Slip
Faults
Think back to yesterday…..
 If a reverse occurs at a Convergent,
THINK-PAIR-SHARE: predict which
occurs at a DIVERGENT?
 YESS!!! A normal Fault occurs!
 Lets check out some examples!
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Normal Faults occur at Divergent
Boundaries
Divergent Plate Combinations
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Turn to your neighbor and name the two
types of plates.
 Oceanic
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and continental
What 2 plate combinations can you make
using oceanic and continental?
 O-O
 C-C
Let’s start with O-O
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What landforms are created as a result of
an oceanic-oceanic divergent boundary?
O-O
A rift valley (new crust)
 Volcanic Mid ocean ridge.
 Real world examples:
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
The Mid-Atlantic Ridge
 Krafla Volcano(in Iceland)
C-C
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Landforms created?
C-C
Rift Valley (new crust)
 Volcano
 Real world example:
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 African
Rift Valley
Transform
Boundaries
Transform Boundaries
Pair up: Predict what movement occurs at
this boundary.
 Green cards pair up with blue cards.
 Red cards pair up with yellow cards.
 2 min to discuss!
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LET’S DANCE!!
Doin’ the Boundary Bop!
 Find a partner!
 Listen as I call out a boundary!!
 When I say Convergent, how do you and
your partner move? Divergent?
Transform?
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Transform Boundaries
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What fault occurs?
 Not
mine
 Not yours
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Options:
 Normal
 Reverse
 Strike
Slip
Transform
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YES! Strike Slip Faults!
Where can this occur?
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Identify the three plate combinations!
 O-O
 C-C
 O-C
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Put in box
 ANY
2 PLATES!
What occurs at transform
boundaries?
EARTHQUAKES!!!!
 Real world example
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 San
Andreas Fault
Transform Boundary DEMO
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Ladybugs:
 Pick
up your tables index cards & Purple
directions
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4 index card halves
2
card halves are cut straight
 2 card halves are cut jagged
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Follow directions and answer questions in
lab notebook.
Reflection – Exit Ticket (Answer
on index card!)
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Reflect on the three types of boundaries
you have learned about. Include:
 How
are they different?
 How are they similar?
 Combinations of plates (just oceanic,
continental or both?)
 Resulting landforms
 Two new terms you learned
 Evaluate one of your hypotheses – were you
correct? Explain!