Term
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Definition
| continents drifted to current location (from Pangaea) |
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Term
| Who came up with the theory? |
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Definition
|
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Term
| What were two problems with Wegener's theory? |
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Definition
1) No proof
2) No explanation how it happened |
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Term
|
Definition
| similar plant and animal fossils found on both sides of the Atlantic Ocean |
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Term
| What are two climate clues? |
|
Definition
1) Glacial evidence in warmer climates
2) Fossils of ferns in cold climates |
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Term
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Definition
| similar rock types found on both sides pf the Atlantic Ocean |
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Term
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Definition
| molten rock pushed thru at mid-Atlantic ridge |
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Term
| Who came up with the seafloor spreading theory? |
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Definition
|
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Term
| Did Hess have proof? Yes or no? |
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Definition
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Term
|
Definition
1) Newer rocks near mid-Atlantic ridge
2) Magnetic clues in rocks |
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Term
| What is the plate tectonic theory? |
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Definition
| crustal sections (plates) move around on mantle |
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Term
|
Definition
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Term
| What are plate boundaries? |
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Definition
| Plate boundaries are where plates meet. |
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Term
| What are convergent boundaries? |
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Definition
|
|
Term
| What is a type of convergent boundaries? |
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Definition
|
|
Term
| What is continental collision? |
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Definition
| two continental (less dense) plates collide (ex.-India & Asia) |
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Term
| What is a another type of convergent boundaries? |
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Definition
|
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Term
|
Definition
| denser oceanic plate goes under less dense continental plate (ex.-California coast) |
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|
Term
| What is the second type of boundaries? |
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Definition
|
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Term
| What are two types of divergent boundaries? |
|
Definition
| Seafloor spreading and rift valley |
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|
Term
| What is sea floor spreading? |
|
Definition
| two oceanic plates move apart (ex.-mid-Atlantic ridge) |
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Term
|
Definition
| two continental plates move apart (ex.-E. African rift valley) |
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|
Term
| What is the third type of boundaries? |
|
Definition
|
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Term
|
Definition
| Plates slide by each other |
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