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continental driftseafloor spreading

Theory of Plate Tectonics

asthenosphere

Jan 4-9:05 AM

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Nov 6-09:47

If the seafloor is spreading, why isn't the earth getting bigger and bigger?

Nov 6-10:01

Divergent Boundary

are grinding past one another horizontally

California

plate tectonics.notebook

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2 oceanic plates

oceanicsubductedcontinental +

oceanic plates

Sep 9-12:09 PM

Basal Drag/Slab Pull: sinking plates pull the plate with them back into the earth's mantle.

Ridge Push: rising mantle material at mid-ocean ridges pushes plates apart, toward subduction zones.

plate tectonics.notebook

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September 12, 2013

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Nov 7-09:11

Features Caused by Plate Tectonics:

* 1 Side moves down relative to the other* Rift Valleys & Mid-Ocean Ridges

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Mountains & Volcanoes:* Compression Forces (convergent)* 2 continental plates = mountain

* 1 continental + 1 oceanic = volcano

Strike-Slip Faults:* Shearing Forces (Transform fault boundaries)* horizontal movement* example: California

Nov 7-09:24

Testing for Plate Tectonics:* Lasers

* Can measure as little as 1 cm/year

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September 12, 2013

Nov 2-8:58 AM

1. At a transform boundary, plates move:

Nov 2-9:01 AM

2. Seafloor Spreading:

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September 12, 2013

Nov 2-9:07 AM

__________ faults

____________ Boundary

Nov 2-9:09 AM

If a volcano happens at a plate boundary, there

must be a _______________ _______!

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Sep 11-11:50 AM

1. A ________ material is something that is capable of changing shape w/o breaking.

2. A _____________ is one wher e 2 plates collide.

3. 2 plates separate at a ________________________

4. 2 plates slide by each other at a ___________________

5. The sinking of a denser plate below a more buoyant plate is called __________________

6. _______________ is a consequence of the rising mantle of ocean ridges.

7. ________ is the force produced by the sinking of a plate.

8. ____________ is the theory that Earth's surface is made of slowly moving rock plates.

9. The rigid outermost rock layer of Earth is the _________

10. __________ occurs when ma terial circulates through differences in density.

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Nov 2-9:51 AM

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Nov 2-9:53 AM

Dec 30-12:00 PM

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