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