Term
| Who had created the hypothesis of Continental Drift? |
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Definition
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Term
| Why did Continental Drift NOT become a theory? (Great Debate) |
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Definition
1. scientists didn't acccept it
2. he could not explain why they moved |
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Term
| What were the 4 pieces of evidence that Wegener had? |
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Definition
1. Fossils
2. continental jigsaw
3. rock pieces match up
4. glaciers |
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Term
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Definition
| all the continents begin together as a super continent and slowly drifted away on their own |
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Term
| How does the new theory differ from the old one? |
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Definition
| It explains why and how the continents moved |
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Term
| What drives plate movement? |
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Definition
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Term
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Definition
| process of producing new seafloor between two diverging plates |
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Term
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Definition
| long narrow zone where one plate goes beneath another |
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Term
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Definition
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Term
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Definition
| chain of volcanic islands |
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Term
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Definition
| breaks in the oceanic crust |
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Term
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Definition
| hot magma rises due to density |
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Term
| How does the subduction of a cool slab cause mantle rock to melt? |
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Definition
| water being squeezed out of a rock |
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Term
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Definition
| When rocks exhibit the same magnetism as the present magnetic field |
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Term
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Definition
| natural remains of magnetism in rock bodies |
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Term
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Definition
| rocks exhibiting opposite magnetism |
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Term
| what are the 3 evidences of plate tectonics? |
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Definition
1. ocean drilling
2. hot spots
3. paleomagnetism |
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Term
| What is the Evidence for Ocean Drilling? |
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Definition
1. Age of Rock is equal as it goes further away from ridge
2. the amount of sediment increases the further you go away from the ridge. |
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Term
| What is the Evidence for hotspots? |
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Definition
| 1. The further you get from Hawaii, the age of the volcanoes increases |
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Term
| What is the evidence for Paleomagnetism? |
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Definition
1. polar wandering data: magnetic rocks are not lined up with the poles
2. earths magnetic field reverses polarity
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Term
| What causes seafloor spreading? |
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Definition
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Term
| what happens at a subduction zone? |
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Definition
lesss dense plate slides under more dense plate
*where volcanoes occur |
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Term
| What are the 3 types of Plate Boundaries? |
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Definition
1. Divergent
2. Convergent
3. Transform |
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Term
| What are the features of Divergent Boundaries? |
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Definition
1. mid-ocean ridges
2. rift valleys
3. fissure volcanoes
4. earthquakes at fracture zones |
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Term
| What are the features of ocean-ocean boundaries? |
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Definition
1. deep ocean trenches
2. eathquakes
3. oceanic arc volcanoes |
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Term
| What are the features of ocean-continent boundaries? |
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Definition
1. earthquakes
2. continental volcanic arc
3. trenches |
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Term
| What are the features of continent-continent boundaries? |
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Definition
1. earthquakes
2. mountains |
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Term
| What are the features of transform boundaries? |
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Definition
1. fracture zones
2. earthquakes |
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