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| Occurs at mid ocean idges and subduction occures at deep ocean trenches. |
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2 plates moves away from each other
- Creates valleys, or rifts, smal volcnoes and shallow earth quakes |
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Two plates moving towards each other
-Creates mountians tenches subduction zones colvanoes and earth quakes |
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Two plates roghly sliding past each other
- Creates Earhquakes and strike a faults are reated |
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| Three forces work together to move Tetonic Plates |
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Definition
MANTLE PLATE- Plates float and flow atop semi liquid
RIDGE PUSH-
Newly formed floor pushes plates apart
STAB PULL-
Sinking of plate at subduction Zone pulls entire plate alone |
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| Lie alng convergent ocean boundries |
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| Mid Ocean Ridge and Rift Valleys |
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Rising plumes of ho mantle magma Creates volcanic belts along the edge of continents. as subducting plates is melted and rises as magma.
-Creates island chains |
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| Results when tetonic forces over come the friction between to plates. |
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| Location of the earth quake within Lithospear |
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| Surface location above the focus of the earth quake |
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| Travels through the layers of earth |
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| Compressde waves pass through ALL layers of the eart, Fast acuse particles vibrate |
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| Created when body waves reach surface traveling along the outside of the earth |
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| Heat rises to the crust and expands. Makes the crust thiner and it cracks open. Magma comes to surface. as it cools magma pushes plate apart. |
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| litohspear continues to cool as its moved away from the sperading ridge,, Oceanic plates becomes heavy and sinks down about 700 kn diwb tge temperature and pressure softens the plate recycling it into the mantle |
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| EarthQuakes transmit Mechanicla energy in form of seismic waves, There are two main types of Seismic waves Body and Surface waves |
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| (P-WAVES) are compression waves the particle o the medium vibrate. P-WAVES- travels fast and can travel through solid liquid or gas. the pass through all layers of the earth |
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| (S-WAVES) are shear waves they vibrate perpendiculat to the direction of the wave. They travel more slowly and can travel only thoug solid rock not through the liquid core. |
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| Measures the changes in waves speed and direction and has provided evident about the earth structre of the planet |
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Surface waves travel on the outside of eart causing the most destruction
Body waves travels more sloyly and die within a few kilometers. |
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oceanic- Oceanic Convergent Boundries creat Islands
Oceanic- Continental Convergent boundries creat deep ocean trenches
Continental- Continental convergent boundries creat inland mountain ranges |
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