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Model seafloor of spreading summary
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One copy of the sea-floor spreading model (see following page) Scissors. South becomes north and north becomes south. Problem How does sea-floor spreading add material to the ocean floor? 25 pts. Like the scientists before us, we will now merge the ideas of continental drift and seafloor spreading into the theory of plate tectonics Visit the post for more. The theory of plate tectonics states that the Earth's lithosphere is fragmented into a dozen or more large and small plates that are moving relative to one another as they ride atop the hotter, more mobile asthenosphere (upper layer of Earth’s mantle). The sea-floor spreading hypothesis was first formulated by Hess (1960, 1962).The mid-ocean ridges, which are characterized by unusually high heat flow along their crests, are the largest topographic features on the surface of the Earth Sea Floor Spreading-Divergent Plate Boundaries | Carolina.com This is a student modeling activity for divergent plate boundaries that illustrates the surface and internal processes occurring at divergent plate boundaries. Plates of lithosphere move because of convection currents in the mantle. B.get older with increasing distance from a mid-ocean ridge. The center slit represents a Mid-Ocean Ridge 2. Draw a diagram of the model. The best known ridge on the globe runs straight down the. Sea Floor Spreading-Divergent Plate Boundaries | Carolina.com This is a student modeling activity for divergent plate boundaries that illustrates the summary of seafloor spreading model surface and internal processes occurring at divergent plate boundaries. Plate Tectonics and the Sea Floor Activity: Sea Floor Spreading 2 mid-Atlantic ridge that mirror each other. Scientists have found strange rocks shaped like pillows in the central valleyof the mid-ocean ridge.
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Igneous rocks rise along conduits from the mantle, giving rise to volcanic activity in a narrow band along the mid-ocean ridges.As these cool, the basaltic lavas and dykes form the upper part of the oceanic crust, and the underlying magma chamber solidifies to. The rocks on the seafloor show the history of the magnetic changes in the earth Wherever the sea floor is spreading, the edges move apart while the magma in the middle hardens. PURPOSE: The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea-floor spreading and subduction. Thus, the …. New ocean crust is continually added to Earth along these ridges in a process called sea-floor spreading. Alfred Wegener, a German meteorologist born in 1880, developed the idea of continental drift. The oldest sections should be the sections on both sides furthest from the middle 4. 2. The presence of these rocks supports the theory of sea-floor. At spreading centres, this crust is separated into parallel bands of rock by successive waves of emergent magma. Scientists use the magnetic polarity of the sea floor to determine the age. The mid-ocean ridge is where the seafloor. Sea Floor Spreading summary of seafloor spreading model Under 1. The students learned a lot and I also learned a lot from my students through this activity When the concept of seafloor spreading came along, scientists recognized that it was the mechanism to explain how continents could move around Earth’s surface. Activity Seafloor Spreading. 2) Describe the process shown occurring at B, and explain what results from this. Seafloor spreading causes the …. For example, every million years the Earth’s magnetic poles tend to reverse 4 or 5 times. Format.