PPT-Seafloor Spreading

Postactivity 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. 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. S. eabottom. . B. iosphere. “It just screamed out that there had to be some kind of microbial community there to exploit the energy involved in this water–rock . reaction”. Introduction to C-DEBI:. 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.. . a. . . q. . Kk. Subduction. Continental. Crust. Oceanic. Crust. Accretionary. Prism. Volcanic. Arc. Trench. Rifting. Spreading. Center. Granite. Basalt. The role of . partial melting. 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. . Subduction. Fun Fact: The tallest mountain in the world is…. Not Mt. Everest (29,028 ft). It’s Mauna Kea in Hawaii! (31,000 ft) . It doesn’t get as much attention because 2/3 of it is underwater. 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. By: . Rishon. Pryce, Kaylee French. Period – 6. 09/21/15. 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 . the 2011 Tohoku Earthquake detected by GPS/acoustic geodetic observation. Tadashi Ishikawa. Hydrographic and Oceanographic Department. Japan Coast Guard(JCG). UNAVCO 2012 Science Workshop. Mar. 1, 2012. Harrisburg, PA: Wild Resource Conservation Fund, 1995. Pennsylvania Endangered Plant Species State Rank: S1 (critically imperiled), Global Rank: G4 (apparently secure) T3 (vulnerabl Harrisburg PA Wild Resource Conservation Fund 1995 Pennsylvania Endangered Plant Species State Rank S1 critically imperiled Global Rank G4 apparently secure T3 vulnerable subspecies Conasprella. . marylandica. : Predatory cone snail that crawled on the seafloor and hunted and ate worms.. Fusinus. . equalis. : Predatory spindle snail that crawled on the seafloor and hunted snails, clams, or worms.. 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. .