2. Plate Tectonics Daily Two 12/1,2 Objective: Recall basic information about the solid earth Q. What are the three main parts of the geosphere? A. Crust, Mantle, Core Q. Why is the solid earth layered? A. Density differences
3. Plate Tectonics Daily Two 12/3,4 Objective: Understand the evidence supporting continental drift What is the lithosphere composed of? Upper mantle + crust How is the asthenosphere different from the lithosphere? Squishy, Higher density, Hotter Crunchy Squishy
4. Plate Tectonics Daily Two 12/5,8 Objective: Understand the evidence supporting continental drift What types of evidence did Alfred Wegener use to support his Continental Drift hypothesis? Puzzle Fit Fossils Mountain Ranges Glaciers What is the continental drift hypothesis? The idea that the continents had once been joined to form a single supercontinent - Pangea
5. Plate Tectonics Daily Two, 12/9,10 Objective: Understand the historical perspective of the Continental Drift Hypothesis Why did the scientists in the early 1900s reject Wegener’s Continental Drift Hypothesis? What new evidence has been found to support Wegener’s ideas? Ocean Floor Magnetism Earthquake Data Hot Spots Ocean Drilling NoMechanism
