How Old is the Earth? James C. Wood‚ Sr. Liberty University PHSC-210 – Elements of Earth Science Instructor Mark Ivins March 2‚ 2015 Introduction The scientific community has been split on many things and the age of the earth is one of the subjects in which it is split. There are some who believe that the earth is billions of years old based on scientific measurements and there are others who believe that the earth is only thousands of years old based off of what the Bible teaches. Radiometric
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more towards the land mass. Later closure of the Iapetus Ocean moved the passive margin further inland as the oceanic plate subducted under Laurentian plate (Stone‚ 2012) (figure 2). During this event‚ Franklinian basin probably transformed into a foreland basin as a result of the subduction of Iapetus Oceanic plate which preceded the formation of supercontinent Pannotia. Plate tectonic
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called volcanology. Divergent plate boundaries: At the mid-oceanic ridges‚ two tectonic plates diverge from one another. New oceanic crust is being formed by hot molten rock slowly cooling and solidifying. The crust is very thin at mid-oceanic ridges due to the pull of the tectonic plates. The release of pressure due to the thinning of the crust leads to adiabatic expansion‚ and the partial melting of the mantle causing volcanism and creating new oceanic crust. Most divergent plate boundaries are at the
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circulation. This is called plate tectonics. 4. The origin of earth’s magnetic field is a result of molten metal in the outer core that circulates around the inner core like a giant dynamo. Magnetism of the lithosphere supports the model of plate tectonics through the development of new oceanic crust that formed volcanism at the ridge crest in the prevailing polarity. This new crust was split apart and then moved in opposite directions. This explains new lithosphere at mid oceanic plate margins. 5. Gravity
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difference between the theories of Plate tectonics and Continental drift. * Continental drift: The movement‚ formation‚ or re-formation of continents described by the theory of plate tectonics. * Plate tectonics: A theory that explains the global distribution of geological phenomena such as seismicity‚ volcanism‚ continental drift‚ and mountain building in terms of the formation‚ destruction‚ movement‚ and interaction of the earth’s lithospheric plates. Describe the 3 types of color patterns
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set out and are working hard to try to find signs of life under the rubble. Sadly‚ this is nothing new to Italy. Just like Italy‚ California has a major past for big earthquakes. So‚ what caused the Italy earthquake? Earthquakes are caused by tectonic plates‚ which constantly move and
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the west coast. The Andes is formed by folding‚ a tectonic process taking place along the destructive plate boundary. The Nazca Plate which is an oceanic plate in the west is dragged to move towards the South American Plate which is a continental plate in the east. The force driving the two plates to collide is resulted by converging subcrustal currents of magma in the asthenosphere below the earth crust. Such slow collision of the two plates takes place very slowly over millions of years in earth’s
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of San Francisco. Tectonic movement along the fault has been associated with occasional large earthquakes originating near the surface along its path‚ including a disastrous quake in San Francisco in 1906‚ a less serious event there in 1989‚ and a strong and destructive quake centered in the Los Angeles suburb of Northridge in 1994 that occurred along one of the San Andreas’s larger secondary faults. The San Andreas Fault is a conservative boundary between two major plates of the Earth’s crust:
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The Continental Puzzle b. Matching Fossils c. Rock Types and Structures d. Ancient Climates C. Evidence of Plate Tectonics 1. Sea-floor Spreading 2. Paleomagnetism D. Plate Boundaries 1. Divergent Plate Boundary 2. Convergent Plate Boundary a. Oceanic-Oceanic Convergence b. Oceanic-Continental Convergence c. Continental-Continental Convergence 3. Transform Plate Boundary E. Convection F. Hot Spots G. Volcanism 1. Warning Signs of a volcanic eruption H. Earthquakes
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Computer-Assisted Instruction and Science What Is Computer-Assisted Instruction? “Computer-assisted instruction” (CAI) refers to instruction or remediation presented on a computer. Many educational computer programs are available online and from computer stores and textbook companies. They enhance teacher instruction in several ways. Computer programs are interactive and can illustrate a concept through attractive animation‚ sound‚ and demonstration. They allow students to progress at their
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