questions on plate tectonics

Catastrophism The idea that large-scale Earth changes can only happen during large catastrophic events. 3. But after the Atlantic Ocean opened up, the circulation pattern began to change. Conceptual Physics. New York: Addison-Wesley, 1998. Is The New Status Hitting Your State Of Mind? is in a semisolid state. In places where two convection cells moved apart, there would be a divergent plate boundary, such as a mid-ocean ridge. Site also includes links to current information about earthquakes. Question 1 . BACK TO EDMODO. When Pangaea began breaking up, water in the ocean was free to circulate around the planet at the equator. Meissner, Rolf. Perhaps the biggest question is also the simplest one: What makes the tectonic plates move in the first place? The Scientists. The crust is part of the top layer of Earth called the lithosphere. Take Australia for instance. USGS: This Dynamic Earth The Story of Plate Tectonics, http://pubs.usgs.gov/gip/dynamic/dynamic.html. Earth's core has two parts: a solid inner core and a liquid outer core. Seismic wave The type of wave produced by an earthquake. As of yet, there is no proof that this occurs, but many geologists continue to explore this question. P-wave Longitudinal wave generated by an earthquake that travels at high speed and is usually the first to arrive at a seismograph. Earthquake The shaking of Earth's surface caused by the movement of the crust along a fault zone. 0. Seismic data shows that the asthenosphere, Plate Tectonics Helps Other Scientists Make New Discoveries. New York: Basic Books, 2001. One example relates to the way that moving continents have changed the circulation pattern of ocean currents. Inventions That Changed the. Plate Tectonics. Plate Tectonics . According to the theory, when Gondwanaland broke up, Australia was the first to separate from the rest of the continents. Moho (Mohorovicic Discontinuity) The layer between the crust and the mantle; it was discovered by and named for Andrija Mohorovicic. 2nd ed. Radioactive decay The process where one element turns into another while releasing radiation. Missed a question here and there? Everything You Need to Teach Volcanoes. 180 seconds . Decay rate The speed at which a radioactive element changes from parent element to daughter element. New York: Copernicus Books, 2002. This separation prevented them from following the same evolutionary pathways that the mammals in the rest of the world followed. New York: Children's Press, 2000. Reconstructions of past continents have helped scientists in the fi elds of climatology and biology solve some of their own mysteries. Remember, it took over 50 years for modern plate tectonic theory to come together. Subduction zone A trench in the ocean where subduction takes place. Thompson, Luke. When the connection between North and South America, including Central America, was made about 2 million years ago, the equatorial circulation was blocked. All quizzes. Piel, Gerard. The reason for the existence of these unusual animals is related to the theory of plate tectonics. Radiation The energy released by the radioactive decay of different elements. A Science Odyssey: People and Discoveries http://www.pbs.org/wgbh/aso/databank/index.html. North magnetic pole The point on Earth where the lines of the magnetic field come together. Crust The outermost layer of the Earth. It causes earthquakes, volcanoes, the rise of mountains etc. Granite A type of igneous rock that is rich in quartz and is found mostly on the continents. Lava Hot liquid rock that comes out of a volcano. Find a quiz. About Submarine trench A large rip in the crust of the Earth. Epicenter The point on Earth's surface directly above the place where an earthquake occurs. Quiz not found! United States Geological Survey (USGS): Men and Women of Seismology http://earthquake.usgs.gov/learning/topics/people.php. Bethesda, Md. Core The center of the Earth. Remnant magnetism Phenomenon where magnetite crystals in Earth's magma harden to form magnetic crystals that act as little microscopic compass needles pointing to Earth's north magnetic pole.

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