Term
| Name the continental plates. |
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Definition
| African plate, N. American Plate, S. American Plate, Eurasian Plate, Indian Australian Plate |
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Term
| What plate is the largest? |
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Definition
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Term
| Compare the shape of converging and diverging plate boundaries. |
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Definition
| Diverging boundaries are jagged(faults) while converging boundaries are smoother(trenches). |
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Term
| What ocean plate is colliding with the South American plate? |
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Definition
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Term
| Mountains can be classified into what four groups? |
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Definition
| Plate Tectonic mtns, Folded mtns, Fault Block mtns, and Dome mtns. |
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Term
| What is a continental margin? |
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Definition
| The continental shelf and the continental slope. |
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Term
| What is a continental shelf? |
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Definition
| Relatively flat area of land that goes up a coast. It is underwater. |
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Term
| What is a continental slope? |
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Definition
| The area of land between the continental shelf and the bottom of the ocean. |
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Term
| How are continental margins classified? |
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Definition
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Term
| What is an active continental margin? |
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Definition
| Margin where there is tectonic movement, earth quakes, volcanoes, etc. |
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Term
| What is a passive continental margin? |
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Definition
| Margin where there is no tectonic movement, only erosion and weathering. |
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Term
West coast US= A or P?
East coast US= A or P? |
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Definition
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Term
| What forms at a subduction zone? |
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Definition
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Term
| Which is older, passive or active? Which is wider? |
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Definition
| Passive margins are older and wider. |
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Term
| What are the 2 kinds of vertical faults? |
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Definition
| Normal and reverse(thrust) |
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Term
| What is a hanging wall? A foot wall? |
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Definition
| A hanging wall is the half of a vertical fault with an acute angle at the top. A foot wall has an obtuse angle at the top. |
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Term
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Definition
| Vertical fault, hanging wall on bottom, foot wall on top. |
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Term
| Describe a reverse fault. |
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Definition
| Vertical fault, hanging wall on top, foot wall on bottom. |
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Term
| When do tilting and uplift occur? |
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Definition
| When a rock is too hard or something to fault and instead either the whole rock is tilted up or lifted up. |
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Term
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Definition
| When forces come from the sides, causing the rock to buckle. |
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Term
| What is and anticline? A syncline? A limb? |
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Definition
| In a fold, the anticline is the top of the curve, the syncline is the bottom, and the limb connects the two. |
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Term
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Definition
| A fracture surface along which motion has taken place. |
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Term
| What is a strike-slip fault? |
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Definition
| A type of horizontal fault. Ex. San Andreas Fault |
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Term
| What fuels continental drift? |
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Definition
| Release of heat and pressure. |
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Term
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Definition
| A scientist who was a pioneer in the theory of Pangaea and continental drift. |
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Term
| What were the two supercontinents that split up Pangaea? |
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Definition
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Term
| What sea dived Laurasia and Gondwana and what sea(s) is it now? |
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Definition
| The Tethys Sea; Mediterranean, Black, and Caspian. |
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Term
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Definition
| The crust and the outermost part of the mantle. It is solid. |
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Term
| What is the asthenosphere? |
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Definition
| The rest of the mantle. It is soft and liquid. |
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Term
| Where are convection currents found, in the lithosphere or asthenosphere? |
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Definition
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Term
| Why is the only liquid part of the earth the asthenosphere? |
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Definition
| Because it is too cold closer to the surface and there is too much pressure closer to the core. |
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Term
| Are all ocean floors the same age? What is the oldest ocean? |
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Definition
| NO! Pacific plate contains oldest oceanic crust. |
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Term
| What is an oceanic ridge? |
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Definition
| A ridge found at two diverging oceanic plates. A rift is formed which allows lava out to form the ridge. |
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Term
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Definition
| Volcanic islands found on the landward side of trenches. |
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Term
| What is a transform fault? |
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Definition
| A fault that occurs due to horizontal sliding. |
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Term
| Name the first two major plate movements that broke up Pangaea. |
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Definition
| A north-south split(Laurasia and Gondwana) then an east-west split(split up Laurasia and Gondwana). |
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Term
| What are convection currents? Where do they occur? |
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Definition
| Currents that circulate heat flow. They only can occur in a liquid or a gas. |
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Term
| Name the layers of the Earth starting at the center. |
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Definition
| Inner core, outer core, mantle, asthenosphere, lithosphere. |
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Term
| What increases as you move farther into the Earth? |
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Definition
| Pressure, density, temperature. |
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Term
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Definition
| Because of immense pressure. |
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Term
| When there is a divergent junction, are convestion currents rising or falling? |
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Definition
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Term
| At oceanic-oceanic converging boundaries, which plate goes into the subduction zone? |
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Definition
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Term
| At oceanic-continental converging boundaries, which one goes down into subduction zone? |
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Definition
| Oceanic, b/c it is denser. |
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Term
| Is there a subduction zone when two continental plates collide? What happens? |
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Definition
| No, but the less massive plate gets tucked under a little. |
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Term
| What kind of mountains are found at continental-continental plate collisions and why? |
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Definition
| Sedimentary, b/c there was probably an ocean between the two plate before and it probably had sedimenary rock. It is being pushed up in the collision. |
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Term
| What are the two types of divergent plate boundaries? |
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Definition
| Continental rifting and Oceanic ridges. |
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Term
| What does continental rifting do? |
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Definition
| Same thing as oceanic rifting but is much harder to form ridges b/c continental crust is thicker and takes longer for rift to get deep enough. |
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Term
| When there is a convergent junction, are convestion currents rising or falling? |
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Definition
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Term
| What geologic features are found at oceanic-oceanic converging boundaries? |
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Definition
| Subduction zones, trenches, and island arcs. |
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