PPT-The use of sonar, and the theory of seafloor spreading.

By Rishon Pryce Kaylee French Period 6 092115 Sonar The definition of sonar is Sonar an acronym for sound navigation is a way to use sound to navigate communicate or detect objects on or under the surface of the water such . ABOUT YOUR SONAR TERMINOLOGY: The following is an explanation of the basic terms used by Imagenex to describe their sonartechniques. The different colors used to represent the varying echo return str Today you need to know. Explain what evidence there was to support the theory of continental drift – suggested by Alfred Wegener. Explain why the scientific community did not accept his theory. Understand how seafloor spreading provided further evidence that his theory was correct. Check your notes for . key ideas!. 1. Mid-Ocean Ridges.  . . An . underwater mountain . range stretching all over Earth.. . Scientists . used sonar to map the ocean . floor. Mapping the mid-ocean ridge made scientists more curious about what is happening . Presented by:. Clarissa Dobson. Cheryl . Houde. Joe . Kaliszewski. Alana . Gross. Students will be able to relate different plate boundaries to the mid-continental rift and its importance to the area.. Magma expands when heated making volume larger making magma less dense therefore it will __________ to the top of more dense magma . When the magma reaches the surface it cools and contracts becoming _________ _____________ and it will sink.. Post-activity answers.. Magma erupting; seafloor spreading. 1. What is happening at Slit B? What feature occurs at the corresponding location on the seafloor/. Subduction. Trenches.. 2. What is happening at slits A and C? What features occur at corresponding locations on the seafloor?. 8 September 2014. Tallest Mountain on Earth. Mauna Kea Mount Everest. Seafloor is Dynamic. Mariana Trench: deepest part of the ocean (11,000m). Average ocean depth ≈ 3,700 meters (m). Seafloor is Dynamic. Evidence for Plate Tectonics. Changes in Sea Floor Magnetism. Evidence for Plate Tectonics. Continents fit together like a puzzle. Changes in Sea Floor Magnetism. Evidence for Plate Tectonics. Fossils of plants and animals of the same species found on different continents. . Earth’s Internal Layers. The . crust. varies in thickness (4-60 km) oxygen, silicon, magnesium and iron. The . mantle. (2885 km) silicon & oxygen. Outer core. (2270 km) iron & nickle – liquid. A. nd . R. anging . What is a Sonar?. A Sonar is a system that uses transmitted and reflected underwater objects or measure the distances underwater. . What is it’s Purpose?. It has been used form submarine and mine detection, depth detection , commercial fishing, driving safety and communication at sea. . (binnenkort). aan gebruikers te bieden? . Walter Van Trier. 26 november 2010. 2. Structuur van de uiteenzetting. . Wat is SONAR?. Welk opzet?. Het SONAR-concept. De SONAR-gegevensbank. Slotbedenking?. Zaro Transportation is a Laredo, Texas-based transportation company that provides door-to-door freight services and coverage throughout Mexico and the United States, crossing through the port of Lared Professional Fisheries Patrol Vessel Available for Chartered Survey WorkDesigned and built with patrol duties and survey capabilities in mind12a Riverside Business CentreBrighton RoadShoreham-by-SeaWe By: April Carlisle and Stephen Loucks. Harry Hess. The surface of this planet is not fixed as it seems but rather broken up like pieces of a jigsaw puzzle. There are enormous plates that move under Earth, this process is called plate tectonic, and it transformed the thinking of geologist everywhere. One of them, Harry Hess, was a factor in figuring out how plate tectonics worked. .