You can quickly pay through credit card or Stuvia-credit for the summaries. To analyze plate movement more precisely, scientists study hotspots. Current evidence seems to support slab pull more than ridge push or gravitational sliding. Activity D: Spreading Plates. Student exploration plate tectonics answer key 2020. What makes it different is this hotspot is located under a thick, continental plate. Convergent boundaries, also called destructive boundaries, are places where two or more plates move toward each other.. Convergent boundary movement is divided into two types, subduction, and collision, depending on the density of the involved plates.
This type of transform boundary may contain a single fault or series of faults, which develop in places where plate tectonic stresses are transferred to the surface. Pasyanos, M. E., 2010, Lithospheric thickness modeled from long-period surface wave dispersion: Tectonophysics, v. Student exploration plate tectonics answer key grade 6. 481, no. 2 Yellowstone hotspot. These undersea rift volcanoes produce more lava than all other types of volcanism combined. Very great earthquakes occur on average about once per year. 2 Layers of the Earth.
Video by Tanya Atwater. They believe the liquid component of the core was created as the iron and nickel sank into the center of the planet, where it was liquefied by intense pressure. Question: What happens when plates slide past one another? In general, the Earth can be divided into layers based on chemical composition and physical characteristics. This model of ridge formation suggests the sections of lithosphere furthest away from the mid-ocean ridges will be the oldest. Conclusion: Write a summary of the 4 types of plate boundaries with descriptions. Note that because the motion of the plates is not exactly parallel to the fault, it causes divergent motion in the interior of North America. Observe the effect of each variable on plant height, plant mass, leaf color and leaf size. Oldham, R. D., 1906, The constitution of the interior of the Earth, as revealed by earthquakes: Q. London, v. 62, no. Transform, convergent-collisonal, subduction, divergent. B., Dymond, J. G., Gordon, L. I., Edmond, J. M., von Heezen, R. Gizmo of the Week: Plate Tectonics. P., Ballard, R. D., Green, K., Williams, D. L., Bainbridge, A., Crane, K., and van Andel, T. H., 1979, Submarine thermal springs on the Galapagos Rift: Science, v. 203, p. 107321083. Course Hero member to access this document.
The resulting emitted hydrothermal water looks like black underwater smoke. Student exploration plate tectonics answer key chemistry. The Basin and Range region located in the western United States is a type of broad rift. Unlike subduction-zone earthquakes, which tend to be located along a narrow swath near the convergent boundary, collision-zone earthquakes may occur hundreds of kilometers from the boundary between the plates. For example, they estimate Pangea began separating 200 million years ago. In their liquid state as magma or lava, the magnetic poles of the minerals align themselves with the Earth's magnetic field.
Through a union of hypothetical modeling, astronomical insight, and hard seismic data, they concluded the core is mostly metallic iron. Of course, it is difficult to collect data from these deep-Earth features due to the extremely high pressure and temperature. Note: You can refer to a world map or atlas for location names. Thankfully they are also less frequent. There are divergent, which creates a mid ocean ridge and there are also transform, which make earthquakes. If the built-up energy between the plates is suddenly released, the result is an earthquake. A mid-ocean ridge usually originates in a continental plate as a rift zone that expands to the point of splitting the plate apart, with seawater filling in the gap. Others started piecing together complicated histories of tectonic plate movement.
An earthquake is a violent shaking of Earth's surface. The concept of plate tectonics was just as revolutionary for geology. Some geologists believe mantle plumes are remnants of these periods of increased mantle temperature and convection upwelling, and study them for clues about the origin of continental rifting. This how you know that you are buying the best documents. 5 Transform Boundaries. Plate Tectonics Gizmo. Stern, R. J., 2004, Subduction initiation: spontaneous and induced: Earth Planet. Some suggest that hotspots originate from super-heated material from as deep as the core that reaches the Earth's crust as a mantle plume. The depth at which the asthenosphere is found is temperature-dependent. What are the layers of Earth that you can see? Wegener's work was considered a fringe science theory for his entire life. In 1959, Harry Hess proposed the hypothesis of seafloor spreading – that the mid-ocean ridges represented tectonic plate factories, where new oceanic plate was issuing from these long volcanic ridges.
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