describe how a metamorphic rock might change into an igneous rock
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Describe how a metamorphic rock might change into an igneous rock. 60. 140. 130. 120. 50. 0. 40. 30. 70. 9. 8. 7. 6. 10. 5. 4. 3. 2. 180. 80. 20. 90. 160. 150. 170. 100. 110. 1. Seconds left:. If metamorphic rock is heated enough to melt, magma forms. - PowerPoint PPT PresentationTRANSCRIPT
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Describe how a metamorphic rock might
change into an igneous rock.
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If metamorphic rock is heated enough to melt, magma forms.
Once magma cools and crystallizes igneous rock forms.
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Describe plate tectonics
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The theory that the earth's surface is divided into a few large, thick plates
that are continually moving.
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Describe Sea-floor spreading
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Magma moves upward and out of cracks in the seafloor. As it hardens on the
surface, new seafloor forms. Older seafloor is pushed away from the edge.
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What are the general ways that plates
interact?
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Plates can collide, pull apart, or move past one another.
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What are the main features of Plate Tectonics'?
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1. The Earth's surface is covered by a series of crustal plates. 2. The ocean floors are continually moving, spreading from the center, sinking at the edges, and being regenerated. 3. Convection currents beneath the plates move the crustal plates in different directions. 4. The source of heat driving the convection currents is radioactivity deep in the Earths
mantle.
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What are the types of plate boundaries?
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What are the types of plate boundaries?
• Divergent boundaries -- where new crust is generated as the plates pull away from each other.
• Convergent boundaries -- where crust is destroyed as one plate dives under another.
• Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
• Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
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Describe CONVERGENT BOUNDARIES. Sketch a diagram to illustrate them.
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Places where plates crash
or crunch together are
called convergent
boundaries. http://www.cotf.edu/ete/modules/msese/earthsysflr/plates2.html
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Describe DIVERGENT BOUNDARIES. Sketch a diagram to illustrate them.
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Places where plates are
coming apart are called divergent
boundaries.
http://www.cotf.edu/ete/modules/msese/earthsysflr/plates3.html
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Describe TRANSFORM BOUNDARIES. Sketch a diagram to illustrate them.
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Places where plates slide past each other are
called transform
boundaries. . http://www.cotf.edu/ete/modules/msese/earthsysflr/plates4.html
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Sketch and label a model of the layers of the Earth
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http://volcano.und.edu/vwdocs/vwlessons/plate_tectonics/part1.html
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Describe the following:
• Lithosphere -
• Asthenosphere -
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Describe the following:
• Lithosphere - the rigid outermost layer made of crust and uppermost mantle. The lithosphere is the "plate" of the plate tectonic theory.
• Asthenosphere - part of the mantle that flows; the flow of the asthenosphere is part of mantle convection, which plays an important role in moving the plates.