Shared Flashcard Set

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Exam Revision
Geog
25
Geography
9th Grade
06/15/2006

Additional Geography Flashcards

 


 

Cards

Term
Who was Alfred Wegener?
Definition
Came up with the plate tectonics idea . He said they looked like puzzle pieces.
Term
What are the layers of the earth?
Definition
Atmosphere, core,inner crust, outtercrust,mantle
Term
What were the Norther and Southern parts of Pangaea called?
Definition
North-Lurasia
Sout- Gondwanaland
Term
What some of the evidence of continental drift?
Definition
Fossilized plants in Antartica, the contenets fit together like a puzzle and there were the same fossils in South America and Africa.
Term
What are the four types of plate boundaries?
Definition
Constructive,Destructive,Collision,
Conservative
Term
What are the Plate Names?
Definition
Pacific Plate, North American Plate, Nazca Plate, South American,African, Eurasion,Indian,Australian
Term
What is an example of a Constructive Plate boundary?
Definition
Mid-Atlantic Ridge
Term
In a Constructive Plate Boundary the plates move......
Definition
They move away from each other
Term
When do destructive plate boundarys occur?
Definition
When two plates converge
Term
What cand you find at destructive plate boundaries?
Definition
Fold mountains, volcanos,saline lakes and island arcs
Term
How are fold mountains formed?
Definition
When two continental plates (or 1 continental & ceanic) move together
Term
How are collision boundaries formed?
Definition
When the continental crust collides with the continental crust.
Term
What is an example of a collision boundary?
Definition
The Himalayas
Term
What is an exapmple of a destructive plate boundary?
Definition
The Andes Mountains
Term
What is an example of a conservative plate boundary?
Definition
Ridges are found there.. San Andreas Fault
Term
How are glaciers formed?
Definition
When accumulated snow over the years is compacted into ice and it moves downhill due to gravitry
Term
How are corries formed?
Definition
When snow collects in a natural hollow on the mountain side. The extra weight compresses the snow underneath it, turning it into ice. Then the hollow gets deeper.
Term
What are some of the landforms created by glacial erosion?
Definition
corries,arets,pyramidal peaks,u shaped valleys,truncated spurs and hanging valleys.
Term
What are the forms of erosion?
Definition
Freeze Thaw,plucking,abrasion
Term
What is freezethaw?
Definition
When water gets into the rock cracks and freezes, expanding the crack over the years. Eventually the rock breaks off.
Term
What is abrasion?
Definition
When material carried by the glacier acts like sandpaper, rubbing away the sides of the valley.
Term
What is plucking?
Definition
When ice freezes to the rock. When the ice moves, large pieces of rock are pulled away with it.
Term
What is the zone of accumaltion?
Definition
When snowfall exceeds melting and evaporation.
Term
What is the zone of ablation?
Definition
When melting and evaporating exceeds snowfall.
Term
Features of Glacial Deposition?
Definition
Drumlins,erratics,moraine,eskars
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