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CRCT Question

CRCT Question . In the convection currents in a lava lamp, the cooler, more dense goo __. a. rises to the top b. sinks to the bottom c. stays where it is d. goes in circles. Corny Joke of the Day. Why didn’t the mummy have any friends? He was too wrapped up in himself. Week at a Glance.

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CRCT Question

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  1. CRCT Question In the convection currents in a lava lamp, the cooler, more dense goo __. a. rises to the top b. sinks to the bottom c. stays where it is d. goes in circles

  2. Corny Joke of the Day Why didn’t the mummy have any friends? He was too wrapped up in himself

  3. Week at a Glance Monday: Finish Continental Drift Notes Tuesday: Gallery walk, Tier 2 CD Worktime Wednesday: Tier 2 CD worktime-DUE AT THE END OF CLASS Thursday: STUDY GUIDE DUE, Review activities Friday: Vocabulary Sheet DUE. TEST

  4. Tier 2 Rubric Vocabulary: (10 pts each) • Alfred Wegener • Pangaea • Harry Hess • Sea-floor Spreading • Magnetic Pole Reversale • Glossopteris • Fossil Evidence • Geological Evidence • Climate Evidence 10 pts. Organization/Presentation

  5. Vocabulary Sheet Complete 1-4

  6. 1. density Density = Mass/Volume. The amount of mass in a given space. Cold material=more dense=sink Hot Material=less dense=rises

  7. 2. continental crust section of earth's crust that is found underneath the continent. Layer that we live on!

  8. 3. oceanic crust section of earth's crust that is found underneath the ocean. Thinnest Layer. More DENSE then continental

  9. 4. mantle the layer of hot, solid, molten material between Earth's crust and core. Thickest Layer. Contains the convection currents

  10. What does this represent?

  11. Welcome to Ms. Evans Cheer Camp

  12. When I say transform you say Slide

  13. Transform

  14. Transform

  15. When I say Divergent you say Apart

  16. Divergent

  17. Divergent

  18. When I say convergent you say Collide

  19. Convergent

  20. Convergent

  21. II. Sea-Floor Spreading http://www.youtube.com/watch?v=GyMLlLxbfa4&feature=related While you watch….look for • Harry Hess • How did they find the mountain ranges? Let’s watch it in action!

  22. A. The Mid-Ocean Ridge is the longest chain of mountains in the world and are located on the ocean floor.

  23. : www.ocean.udel.edu The Mid-Ocean Ridge system, shown above snaking its way between the continents, is more than 56,000 kilometers (35,000 mi) long. It circles the earth like the stitching on a baseball!

  24. This is a model of sea floor spreading at a divergent boundary called a mid ocean ridge.

  25. SONAR B. Sonar is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. Scientists use sonar to study the ocean floor.

  26. Discovery of Sea-Floor Spreading

  27. C. Evidence for Sea-Floor Spreading • The mid-ocean ridge forms along cracks in the oceanic crust • At the mid-ocean ridge, molten material rises from the mantle and erupts. The molten material then spreads out, pushing older rock to both sides of the ridge • Sea floor spreading is the process by which new material is continually added to the ocean floor. • Several types of evidence is used to support sea-floor spreading – magnetic stripes, molten material, and drilling samples

  28. Sea-Floor Spreading m.y. means million years ago Notice this compass.

  29. Animation of sea floor spreading Can you explain this diagram!?

  30. Amazing proof of that the inner core flips! http://platetectonics.pwnet.org/img/blocks.gif As the sea floor spreads, the lava cools according to the magnetic poles at the time. The rocks on the ocean floor have proved that the earth’s magnetic field sometimes reverses. The inner core flips and so the north pole moves to the southern hemisphere! The earth itself does not flip.

  31. So, if the mid-Atlantic Ridge is getting new crust….is the Earth getting bigger?

  32. D. Subduction at Deep-Ocean Trenches • Deep ocean trenches are where the ocean floor plunges into deep underwater canyons. They are formed where the oceanic crust bends toward the mantle. • Subduction – process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle • At deep ocean trenches, subduction allows part of the ocean floor to sink back into the mantle, over tens of millions of years.

  33. Extra Info The PACIFIC ocean is where most of the crust is getting subducted back into the Earth. Here, there are lot of volcanoes and earthquakes. It’s known as the Ring of Fire!

  34. Plate Tectonics vs. Continental Drift

  35. Tier work time Please, show me the rough draft before you start typing!!!!

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