| Term | Definition |
|
Crust |
The 1st layer of the earth.What we live on. |
|
Contenential Crust |
A part of the crust.(land)It is 30-70 km thick |
|
Oceanic Crust |
A part of the crust.(ocean) 6 km thick. |
|
Upper Mantle |
400 km thick. it is liquid. |
|
Lower mantle |
it is 2,500 km thick, and it is solid. |
|
Outer Core |
it is 2,300 km thick and it is liquid and solid. |
|
Inner Core |
it is 1,200 km thick and it is solid. |
|
Extentional |
Two plates pushing away |
|
Compressional |
Two plates pulling together |
|
Transform |
Two plates going the opposite way. |
|
Pangea |
A super continent that existed around 300 to 250 million years ago. |
|
Fossil |
A item that proved our earths history structure |
|
3 main types of rocks |
Igneous,Sedimentary,Metamorphic |
|
Metamorphic |
A rock formed by heat and pressure |
|
Sedimentary |
A rock formed by erosion |
|
Igneous |
A rock formed by lava |
|
2 types of Igneous rocks |
Extrusive,Intrusive |
|
Extrusive |
A rock formed on earth,by lava |
|
Intrusive |
A rock formed in earth,by lava |
|
What creates our magnetic field |
The internal of earth spinning. |
|
How many plates are there? |
10 major ones and many small ones |