Evidence from sea floor spreading suggests that ________ && ______ crust move as enroums slabs.
(Tetonic Plates)
Continental && Oceanic.
100
Are Convergent && Divergent boundaries alike?
No they are not.
200
They interact at the _____?
Boundries.
200
Continental Plates are light ______&&______ ?
Quartz && Felsbar.
200
Characterzied by ____ _____. (~100 KM In Length)
Long Faults.
200
Plate tectonics is the theory that the _____ _____ ______ of the earth (___ ________) is divided into a couple of dozen "plates" that move around across the earth's surface relative to each other.
outer rigid layer && the lithosphere.
200
The beaches along the eastern margin of North America are the result of the ___________?
weathering.
300
Each Boundary has certain ____ && _____?
charcaters && process.
300
Oceanic PLates are dark in ____ content.
iron
300
Crust is _______ or ___________ along this boundary.
Deformed or Fractured.
300
Observe that _______ different plates are labeled in the cross section.
Seven.
300
The Appalachians were formed during the collision of continents to form a mega continent called ______?
Pangaea.
400
3 differant types of boundaries?
1._________
2._________
3.___________
1. Divergent.
2. Convergent.
3. Transform.
400
Continental Plates are mainly of_______?
Granite.
400
Occur near ______ ______ && on continents.
Ocean ridges.
400
there are _____ plate boundaires.
three.
400
It is clear that the area around the _______ ___________ was once a subduction zone even though it has not been active for the last 250 million years.
Appalachian mountains.
500
Convecation Currents develop in the _______?
Mantle.
500
What Type of Convergent boundary has a deep sea trench?
Oceanic-Contineal.
500
an example is _________?
San Anderas fault.
500
Three ______________ ___________ are present, all of them one way or another involving a ______________ ____.
convergent boundaries && subduction zone.
500
Occasionally in _____ __________, two continental land masses on the opposing plates end up colliding when all of the _______ _________ is subducted.