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20 Cards in this Set
- Front
- Back
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Who was the scientist who proposed the theory of continental drift? |
Alfred Wegener |
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What were three types of evidence that Wegener used to develop the theory of continental drift? |
Fossils, shape of coastlines, matching rocks and mountain ranges on different coastlines |
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What is happening at the mid-ocean ridges? |
New seafloor is created. |
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What layers of the Earth make up the lithosphere? |
The crust and upper mantle |
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How is oceanic crust different than continental crust? |
Oceanic crust is thinner and more dense than continental crust. |
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What layer of the earth do the lithospheric plates move on? |
The lithospheric plates move on the asthenosphere |
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What are the three types of plate boundaries? |
Boundaries are convergent, divergent, or transform |
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How do plates move at a convergent boundary? |
Plates move together. |
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How do plates move at a divergent boundary? |
Plates are moving away from each other. |
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How do plates move at a transform boundary? |
Plates slide past each other. |
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What features can be formed at convergent boundaries? |
Mountains, volcanoes, volcanic islands, and deep sea trenches. |
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What features can be formed at divergent boundaries? |
New seafloor or continental crust. |
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What happens at transform boundaries? |
Earthquakes. |
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What type of boundary is shown in this image? |
Convergent boundary |
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What type of boundary is shown in this image? |
Divergent boundary |
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What type of boundary is shown in this image? |
Transform boundary. |
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What are three types of evidence that prove new seafloor is created at the mid-ocean ridges? |
1. The youngest rocks are located close to the ridge, older rocks further out. 2. Pillow shaped lava (rocks) 3. Patterns of magnetic reversals in the rocks. |
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What does SONAR stand for? |
SOund Navigation And Ranging |
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What type of heat transfer moves heat from the cores to the crust? |
Convection currents in the mantle |
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Ring of Fire |
Series of convergent boundaries where the Pacific plate is subducted (pushed under). Most of the volcanoes and earthquakes in the world occur here. |
