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Survey Chapter 9
Survey Chapter 9
24
Environmental Studies
9th Grade
02/26/2013

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Cards

Term
What was the name of the super continent?
Definition
Pangaea, meaning all land
Term
What did Wegener argue must have once been joined based on fossils?
Definition
South America and Africa must have been joined
Term
What does rock evidence exists in the form of?
Definition
Rock evidence is continental drift exist in the form of several mountain belts that end at one coastline, only to reappear on a landmass across the ocean
Term
Where did areas of glacial till found?
Definition
LAYERS of glacial till were found in Southern Africa and South America, as well as India and Australia.
Term
What could Wegener not describe?
Definition
Wegner could not describe a mechanism that was capable of moving the continents across the globe
Term
What is the new theory known as?
Definition
The new theory was known as plate tectonics
Term
What are the segments of the lithosphere called?
Definition
Plates
Term
What is the movement driven by?
Definition
The movement is driven by the unequal distribution of heat within earth
Term
What are also called spreading centers?
Definition
Divergerant boundaries
Term
What happens at convergent boundaries?
Definition
Two plates move together
Term
What is an example of a transform plate boundary
Definition
Transform plate boundaries are margins where two plates grind past each other without the production or destruction of the lithosphere
Term
What two things continuously add oceanic lithosphere?
Definition
Spreading and up welling of magma continuously adds oceanic lithosphere
Term
What is the longest physical feature on earths surface?
Definition
The system of ocean ridges is the longest physical feature on earths surface
Term
What is the process by which new oceanic lithosphere is produced?
Definition
Seafloor spreading is the process by which plate tectonics produce new oceanic lithosphere
Term
What are subduction zones?
Definition
Destructive plate margins where oceanic crust is being push down in the mantle
Term
What two things control convergent boundaries?
Definition
The type of crust involved forces acting on the plate
Term
What happens when two oceanic slabs converge?
Definition
Term
What happens at transform plate boundaries?
Definition
At transform plate boundaries, plates grind past each other without destroying the lithosphere
Term
Where are most transform plate boundaries located?
Definition
Term
What is normal polarity?
Definition
Term
What is the strongest evidence of seafloor spreading?
Definition
Term
What close link is obvious?
Definition
Term
What was the drilling ship used from 1968 to 1983 named?
Definition
Term
What is the basic driving force for plate movement?
Definition
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