Geology- Plate Tectonics (Study Guide) This week, you will create flashcards for the listed key vocabulary and answer the following Key Concept questions on a separate sheet of paper. Big Ideas Section 1.1 Earth’s Layers 1. Earth’s four layers – inner core, outer core, mantle, crust 2. Lithosphere / Asthenosphere 3. Tectonic Plates Section 1.2 Continents Change Position Over Time 1. continental drift – Alfred Wegner - Pangaea - evidence 2. Convection, Convection Currents, Convection Cells 3. Theory of Plate Tectonics Section 1.3 Tectonics Plates 1. Boundaries- divergent, convergent, transform 2. Mid-Atlantic Ridge, Sea-Floor Spreading & Rift Valley 3. Hot Spots Section 1.4 Plate Movements 1. continental-continental Collision 2. oceanic-oceanic Subduction 3. oceanic-continental Subduction 4. Transform Boundaries Key Vocabulary Inner Core Outer Core Mantle Crust Lithosphere Asthenosphere Tectonic Plates Continental Drift Pangaea Convection Convection Currents Theory of Plate Tectonics Rift Valley Hot Spot Subduction Key Concepts 1. Draw a diagram to show how convection currents affect the movement of tectonic plates. Use arrows to show direction. Describe how convection currents relate to plate tectonics. 2. Contrast/compare: 1) oceanic crust and continental crust 2) lithosphere and asthenosphere 3) outer core and inner core. 3. Describe Alfred Wegener’s hypothesis of continental drift. What evidence did he use to prove his hypothesis? 4. Describe Earth’s crust and mantle. Be sure to discuss each layer’s thickness and density. Use the following terms: continental crust, oceanic crust, lithosphere, and asthenosphere. 5. Explain how density determines Earth’s layers. 6. How does the theory of plate tectonics help geologists predict future geologic events such as volcanoes or earthquakes? 7. What kinds of evidence led to the development of the theory of plate tectonics? 8. What happens when an oceanic plate converges with a continental plate? Use these terms, trench, subduction, and mountains. You may want to draw a picture.