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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.
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.
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.
What are the general
ways that plates
interact?
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Plates can collide, pull apart, or move past
one another.
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.
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.
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/mses
e/earthsysflr/plates2.html
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/mses
e/earthsysflr/plates3.html
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/mses
e/earthsysflr/plates4.html
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
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.