Download Convection Currents - Trimble County Schools

17.4 - Cause of Plate Motions
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Mantle
Earth’s interior between the _______________ and the _________________
Large-scale motion is believed to be the _________________ that drives the
___________________ of tectonic plates
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Convection
Transfer of ___________________ energy by the ___________________ of heated
_____________________ from one place to another
– Ex. Boiling water
Heat comes from ____________________ within the mantle
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Convection current
Cycle of ____________ water rising and _________________ water sinking
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Convection Currents
_______________ of warm water ______________ and cool water ______________
– The cooling of matter causes it to _____________ slightly and increase in
____________________
– then it sinks due to __________________
– Warmed matter is then _________________ and forced to _____________
Convection Currents
Develop in the ___________________
Moves the _______________ and outermost part of the ______________
Transfers thermal energy from Earth’s _______________ to its _______________
Rising material _________________ out, lifts and splits _________________ at
_____________________ boundaries
____________________ movement pulls ___________________ boundaries
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Ridge push
________________ process associated with __________________ currents
Occurs when the ___________________ of an elevated ____________ pushes an
____________________ plate toward a __________________ zone
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Slab pull
________________ process associated with convection currents in Earth’s _________________
Occurs as the ________________ of the ___________________ plate pulls the trailing
___________________ into a ____________________ zone.
Written Response
Sammy is warming a pan of soup on the stove. He gets the soup too hot and it begins to boil.
a. Compare how convection currents in a warming pan of soup are similar to the convection currents inside
Earth’s interior.
b. Explain how this is the force behind plate tectonics.
Use the following words in your open response:
friction
pressure
heat
radiation
dense
sinks
evaporation
lithosphere
cools
expand
rise
RUBRIC
4) * You correctly compare how convection currents in soup are similar to Earth’s
interior.
* You correctly explain how convection currents is the force behind plate tectonics and communicates ideas clearly
* You demonstrate thorough understanding and/or choose more sophisticated processes.
3) * You correctly compare how convection currents in soup are similar to Earth’s
interior.
* You correctly describe how convection currents is the force behind plate tectonics.
* You may demonstrate understanding of major concepts but may overlook or misunderstand some less important ideas
or details.
2) * You correctly compare how convection currents in soup are similar to Earth’s
interior.
* You correctly describe only some important points how convection currents is the force behind plate tectonics.
* You demonstrate that there are gaps in your conceptual understanding.
OR
*Your comparisons of how convection currents in soup are similar to Earth’s interior is minimal.
* You correctly describe how convection currents is the force behind plate tectonics.
* You may demonstrate understanding of major concepts but may overlook or misunderstand some less important ideas
or details.
1) * Your comparisons of how convection currents in soup are similar to Earth’s
interior is minimal.
* You correctly describe only some important points how convection currents is
the force behind plate tectonics.
* You address only a small portion of the question.
OR
* You correctly compare how convection currents in soup are similar to Earth’s
interior.
* There are major errors as to how convection currents is the force behind plate
tectonics.
0) *Your answer is totally incorrect or irrelevant.
Blank) You did not give any answer at all.