Key Concept Summary Interactive Concept Map Chapter Review
- Slides: 15
Key Concept Summary Interactive Concept Map Chapter Review Standardized Test Practice
The theory of plate tectonics states that Earth’s lithosphere is broken up into rigid plates that move over Earth’s surface.
Lesson 1: The Continental Drift Hypothesis • The puzzle piece fit of continents, fossil evidence, climate, rocks, and mountain ranges supports the hypothesis of continental drift. • Scientists were skeptical of continental drift because Wegener could not explain the mechanism for movement.
Lesson 2: Development of a Theory • Seafloor spreading provides a mechanism for continental drift. • Seafloor spreading occurs at mid-ocean ridges. • Evidence of magnetic reversal in rock, thermal energy trends, and the discovery of seafloor spreading all contributed to the development of theory of plate tectonics.
Lesson 3: Theory of Plate Tectonics • Types of plate boundaries, the location of earthquakes, volcanoes, and mountain ranges, and satellite measurement of plate motion support theory of plate tectonics. • Mantle convection, ridge push, and slab pull are the forces that cause plate motion. Radioactivity in the mantle and thermal energy from the core produce the energy for convection.
Which of these have been found on several continents separated by oceans, suggesting that they were once geographically closer together? A. animals B. ice sheets C. plant fossils D. plate boundaries
Which of these refers to the process by which new oceanic crust forms along a mid-ocean ridge as older oceanic crust moves away from the ridge? A. continental drift B. plate tectonics C. seafloor spreading D. magnetic reversal
What is the rigid outermost layer of Earth called? A. mantle B. lithosphere C. plate D. transform plate boundary
What forms where two plates slide past each other? A. transform plate boundary B. divergent plate boundary C. convergent plate boundary D. semiplastic mantle
What is the process in which a denser plate sinks below a more buoyant plate? A. seafloor spreading B. convergence C. convection D. subduction
What is the name of the supercontinent that all continents were once part of? A. Wegener B. Pangaea C. mantle D. seafloor
Where did scientists find glacial features that are usually associated with cooler climates? A. Antarctica B. plate boundaries C. mountain ranges D. Africa
Which term refers to vast mountain ranges on the seafloor? A. volcanoes B. oceanic crust C. pillow lava D. mid-ocean ridges
Which of these states that Earth’s surface is made of rigid slabs of rock that move with respect to one another? A. theory of plate tectonics B. theory of mid-ocean ridges C. theory of divergent plate boundaries D. theory of transform plate boundaries
What is the name for the force that pulls on the rest of a plate as part of a dense plate sinks? A. ridge push B. basal drag C. slab pull D. plate tectonics
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