Using the hot plates and glass plate from earlier, have sponge cut outs of the continents -can compare to a beaker with cold water with a sponge in it not moving
Day 3 Earth Layers
9/15/11 LEQ: HOW does continental drift happen? (reminder: complete sentences!)1. What is Pangaea?2. What is the theory of continental drift?3. What different types of evidence do wehave to support this theory?4. Is it possible to find ice evidence inJamaica? Explain.
AGENDA:• WORK TIME• ACTIVATING STRATEGY• NEW LEQ NOTES/MATERIAL• DEMOS• PRACTICE
Today’s LEQ: How does continental drift happen?By the end of today, you should be able to…1. Explain the geologic conditions that allow continents to move2. Describe convection currents that cause the continents to move
HOT Q: • How would the position of the continents have been different if the inner core was made of a solid block of ice and not hot iron? a. The continents would still be one mega continent, Pangaea b. The continents would be the same position as they are today
(THIS GOES UNDERNEATH YOUR FRAYER DIAGRAM)LITHOSPHERE:ASTHENOSPHERE:TECTONIC PLATES:
CONTINENTS ADRIFT• What form of matter (solid, liquid, or gas) do you think the crust is made of?
(THIS GOES UNDERNEATH YOUR FRAYER DIAGRAM)LITHOSPHERE: the solid crust and therigid top layer of the mantleASTHENOSPHERE: the liquid, tar-likelayer below the lithosphereTECTONIC PLATES: huge slabs of thelithosphere that move because ofconvection currents
DEFINITION: DIAGRAM:The cycle of magma under the crust as it heats, rises, cools, and sinks CONVECTIOCAUSES: EFFECTS: NHotter core temperature CURRENTS plates “drift”Liquid asthenosphere TectonicRigid lithosphere apart!
Steps of Convection Comics!!1. Use the list at your desk to put the steps of convection in order (the first one is done for you)2. Draw a comic strip for the four steps of convection currents!3. Your comic strip should include: A) 4 boxes (1 for each step in the cycle) B) 4 illustrations EXAMPLE: C) the four steps of convection (you may copyLiquid magma in the mantle isheated by the earth’s core the 4 steps exactly if you like, but you are encouraged to be creative!) (add illustration here)
SUMMARIZER• Watch the video again• This preview is for a movie called “Ice Age: Continental Drift”• In 3 sentences or more, explain why the continents ACTAULLY move—(hint—it is not because of a squirrel running around…)• YOU MUST USE EACH OF THE FOLLOWING VOCABULARY FOCUS WORDS in your answer!!! -Lithosphere -Asthenosphere -Convection Current(s) -Tectonic plates
Let’s REVIEW: Earn your seat• What is the name of the mega continent?• Who proposed the theory of continental drift?• What is the theory of continental drift?• What are the 3 types of evidence that support this theory?• Why do the continents move apart?• How do convection currents cause the plates to move?• Why is it possible we could find fossils of tropical plants in Alaska?• How is it possible that similar animal fossils are found on two separate continents?