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Plate Tectonics: Ocean Features Learning Target: Illustrate how internal and surface processes operate to form ocean floor features. Success Criteria: Identify and describe the formation of ocean floor features. Develop a model to show the relative sizes of ocean floor features. Vocabulary: Seamount Mid-Ocean ridge Volcanic island Guyot Trench Abyssal plain Rift valley Continental shelf Submarine canyon Continental slope Continental margin Continental rise Activities: Features of the Ocean Floor Labeling Graphing the Ocean Floor using Sonar Data Homework: 1. The part of the ocean floor that separates the oceanic rise from the thick continental crust and is between the shoreline and the continental shelf break is called the continental_. A. rise B. shelf C. slope D. margin 2. Ocean trenches are formed when_. A. two oceanic plates slide past each other B. an oceanic plate goes under another oceanic plate C. two oceanic plates grind past each other along transform faults D. two oceanic plates hit each other causing both plates to rise up. 3. On the continents, land that rises high above the ground is called a mountain. In the oceans we call this the _. A. delta C. mid-ocean ridge B. abyssal plane D. continental shelf 4. Trenches in the ocean are_. A. close to the shore B. on the continental shelf C. part of the intertidal zone D. the deepest part of the ocean 5. What is the action force responsible for seafloor spreading? A. the destruction of ocean crust in trenches B. the intrusive of magma forced up towards the ocean ridge C. the force of the ocean crust sitting on the asthenosphere D. the differences in mass of the ocean and continental plate 6. Sequence the seafloor features as you move from the shoreline outward into the ocean. A. continental slope – abyssal plain – mid-ocean ridge B. continental slope – continental shelf – abyssal plane C. continental shelf – continental slope – abyssal plane D. continental shelf – continental slope – mid-ocean ridge 7. Volcanic eruptions that begin under ocean water, rise up, and form islands, like the Hawaiian islands, are called _. A. deltas C. seamounts B. dunes D. shields 8. The Atlantic Ocean gets about 3-5 _ wider each year. A. centimeters B. meters 9. C. kilometers D. miles What process does the image represent? A. creation of rift valleys by the divergence of tectonic plates. B. formation of an oceanic trench by the subduction of tectonic plates. C. convergence of tectonic plates, resulting in the creation of fold mountains. D. spreading of new crust created by volcanic activity near a mid-ocean ridge 10. What statement is true about ocean trenches? A. They are located at the rift zone. B. They are the deepest part of the ocean basin. C. They are made up of low hills and flat plains. D. They are almost as deep as valleys found on land.