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29 Cards in this Set
- Front
- Back
Crust
|
the outermost layer of the earth
(less than 1%) |
|
Mantle
|
the layer between the crust and the core
(66%) |
|
Core
|
the innermost layer below the mantle
(33%) |
|
Lithosphere
|
the rigid out layer of the crust
|
|
Asthenosphere
|
soft layer of rock on which the Lithosphere moves
|
|
Mesosphere
|
middle sphere between the Asthenosphere and the Outer Core
|
|
Outer Core
|
liquid rock layer
|
|
Inner Core
|
solid layer of rock
|
|
Tectonic Plates
|
the earth is divided into plates that move on top of the Asthenosphere
|
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Oceanic Crust
|
newer more dense crust formed in the ocean
|
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Continental Crust
|
older less dense crust found where the continents are located
|
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Pangaea
|
one giant super continent before the plates moved apart from one another
|
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Who discovered it and when?
|
Alfred Wegner-German Scientist
Early 1900's |
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Proof Of Wegner's Theory
|
1-The coastlines fit together like puzzle pieces
2-Fossil Evidence-Animal and plant fossilsmatched on different continents 3-Rock Evidence-ROCKS DON'T SWIM!!! 4-Glaciers left marks on mountains as they moved |
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Continental Drift
|
a theory by Alfred Wegner that states that continnent drift apaprt from one another (this is only 1/2 true)
|
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Sea-floor spreading
|
the process where new crust is formed in the Mid-Ocean Ridge(mountain chain underwater)and older crust is pushed away
|
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Mid-Atlantic Ridge
|
Underwater mountains in the Atlantic Ocean
|
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The Theory of Plate Tectonics
|
The theory of Plate Tectonics is that the plates are divided and move on the surdace of the Earth's Lithosphere
|
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3 Theories as to why the Plates Move
|
1-Ridge Push-Oceanic Plates slide down into the Lithosphere and Asthenosphere boundary
2-Convection-hot material rises and cools once it becomes more dense and sinks 3-Slab Pull-Oceanic Plates are more dense and sink causing "Slab Pull" |
|
Convergent Boundary
|
When plates collide
-----> <------ (in result-a strong earthquake) |
|
Divergent Boundary
|
When plates move apart
<----- -----> (in result-a weak earthquake) |
|
Transform Boundary
|
When plates slide
(in result-a stronger earthquake) |
|
Sea-floor spreading
|
the process where new crust is formed in the Mid-Ocean Ridge(mountain chain underwater)and older crust is pushed away
|
|
Mid-Atlantic Ridge
|
Underwater mountains in the Atlantic Ocean
|
|
The Theory of Plate Tectonics
|
The theory of Plate Tectonics is that the plates are divided and move on the surdace of the Earth's Lithosphere
|
|
3 Theories as to why the Plates Move
|
1-Ridge Push-Oceanic Plates slide down into the Lithosphere and Asthenosphere boundary
2-Convection-hot material rises and cools once it becomes more dense and sinks 3-Slab Pull-Oceanic Plates are more dense and sink causing "Slab Pull" |
|
Convergent Boundary
|
When plates collide
-----> <------ (in result-a strong earthquake) |
|
Divergent Boundary
|
When plates move apart
<----- -----> (in result-a weak earthquake) |
|
Transform Boundary
|
When plates slide
(in result-a stronger earthquake) |