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Outcome 7.4 Assessment Flash Cards Questions in this font Answers in this font What are some similarities between Continental Drift theory and Plate Tectonics theory? What evidence do you see in your “Reuniting Pangaea” activity that shows you the continents were once connected? Where are the oldest fossils in a rock column located? How can you determine which animal lived first from a rock column? The Theory that states that all continents were once one large continent (Pangaea) that broke apart into the continents on Earth today. 1. Some continents fit together like jigsaw pieces. 2. Matching fossils on Africa and South America. 3. Matching mountain belts in Africa and South America. 4. Glacier deposits in South America and coal deposits in Antarctica. 5. Data showing that Greenland is moving. Both help us to understand how features (mountains, rift valleys, etc.) have formed on continents and how continents have moved. Evidence from Reuniting Pangaea can be found as… 1. 2. 3. 4. Glossopteris Lystrosaurus Mesosaurus Rock evidence 5. Cynoganthus What are the five pieces of evidence Wegener used to support Continental Drift theory? What is Continental Drift? How does sea-floor spreading create midocean ridges? What are the three types of plate boundaries? The three types of plate boundaries are… 1. Divergent 2. Convergent 3. Transform Sea –floor spreading happens at a divergent boundary. When magma pushes up from the divergent boundary, it creates a mid-ocean ridge. The oldest fossils in a rock column are found at the bottom. You can determine which plant or animal lived first by finding the fossil that is lower in the rock column. Which direction do the three plate boundaries move? Convergent boundaries create mountain ranges by pushing two pieces of continental crust together and causing them to “build up.” Which features are associated with a convergent boundary? Divergent boundaries create rift valleys because they are moving in opposite directions and “tear” the land between them. Which features are associated with a divergent boundary? Transform boundaries create earthquakes when two plates push past each other, catch, build up energy, and release that energy suddenly. What is the only feature of a transform boundary? Convergent boundaries create earthquakes, volcanoes, mountain ranges, deep sea trenches and subduction zones. What is plate tectonics theory? Convergent → ← Divergent ← → Transform – sliding past each other Transform boundary (match the picture) Transform boundaries create earthquakes ONLY. Convergent boundary (match the picture) Divergent boundaries create midocean ridges, sea-floor spreading and earthquakes. Divergent boundary (match the picture) How does a convergent boundary create a mountain range? How does a divergent boundary create a rift valley? The theory that states that the Earth’s crust is divided into plates that move around on the putty-like mantle. How does a transform boundary create an earthquake? Where is the lithosphere and what is it made of? Convection currents happen in the asthenosphere. Where is the asthenosphere and what is it made of? The asthenosphere is just below the lithosphere. It is made of putty-like liquid rock. Where do convection currents happen? Convection currents move the plates when the currents move the plates like groceries on a conveyor belt. How do convection currents move the plates? The lithosphere is the layer of the Earth below the crust that makes up the tectonic plates. The lithosphere is made of solid rock. Weathering (match to the picture) Erosion (match to the picture) Explain weathering in the picture. Explain erosion in the picture.