Term
| What is The theory of continental Drift? |
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Definition
| That continents have slowly moved to their current position. |
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Term
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Definition
| It was a once existing super-continent. |
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Term
| How did Scientists use clues about the fossils found on each continent to hypothesize about the once super-continent? |
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Definition
| They concluded that the same fossil was found on the west cost of Africa and the East coast of South America. |
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Term
| How did scientists use clues about the climate to conclude the same thing? |
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Definition
| They noticed they found plant remains of the same type that could only exist in warmer climates in Canada so they knew that Canada had to be at a lower climate area at one point in time. |
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Term
| How did Scientists also conclude that using rock clues? |
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Definition
| They knew that if the land masses were once connected then they had to have the same rock types at points were they once connected so they matched up the rocks also. |
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Term
| How do scientists measure how deep water is? |
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Definition
| They use Sonar which shoots a beam of sound waves to the seafloor, the longer it takes to get the waves back the deeper the water. |
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Term
| what is seafloor spreading? |
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Definition
| When Hott, less dense material, below Earth's crust, rises toward the surface at the mid-ocean ridges |
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Term
| What is the Theory of Plate Tectonics? |
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Definition
| That earth's crust and part of the upper mantle are broken into sections. |
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Term
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Definition
| Moveing on a plastic-like layer of the mantle. |
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Term
| What excactly is the lithosphere? |
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Definition
| The rigid ayer is about 100 km thick and generally is less dense then the materials underneath. |
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Term
| What is the layer underneath the Lithospere called? |
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Definition
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Term
| What is the Asthenosphere? |
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Definition
| The rigid plates of the Lithosphere float and move around on the asthenosphere. |
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Term
| What are plate boundaries? |
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Definition
| When the plates interact, the result or their actions show at the Plate Boundaries. |
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Term
| What happens when plates move apart? |
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Definition
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Term
| What happens when plates move together? |
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Definition
| They are known as convergent boundaries, when they collide the denser plate sinks under the less denser plate and forms a volcano when a continental and an oceanic plate collide, but when two continental plates collide the cause mountain ranges. |
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Term
| What happens when two oceanic plates collide? |
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Definition
| They form a subduction zone, or a chain of islands. |
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Term
| What about when plates slide past each other? |
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Definition
| These are called transform boundarys. When two plates slide past each other they cause earthquakes. |
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Term
| What are Convection currents? |
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Definition
| They are thought to be the cycle of heat heating, rising, cooling, and sinking. |
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Term
| What kind of plate movement caused the himalaya's? |
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Definition
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Term
| What kind of plate ovement causes a rift valley? |
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Definition
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