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30 Cards in this Set
- Front
- Back
How did the Red Sea, shown between Arabia and Africa in this figure form? |
Continental rifting followed by seafloor spreading |
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The study of the origin and arrangement of the broad structural features of Earth's surface is: |
Tectonics |
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On the map, identify which letter is over a mid-ocean ridge. |
B |
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On the map, identify which letter is over the Atlantic ocean. |
B |
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On the map, identify which letter is over the Pacific Ocean. |
A |
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On the map, identify which letter is over an island arc. |
Feature is not labeled |
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Some continents continue outward from the shoreline under shallow seawater, forming submerged benches called: |
Continental shelves |
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The main reason why the hypothesis of continental drift was not widely accepted was: |
There was no mechanism to move continents through the oceanic crust |
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Which data were used to develop the hypothesis of continental drift? |
All of the above (shape of continents, distribution of fossils, distribution of glacial deposit and directions of glacial scratch marks) |
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The puzzle-like fit of the continents, similarity of rock types across continents, and glacial evidence all were pieces of evidence supporting Wegner's hypothesis of continental drift. What was another piece of supporting evidence? |
Fossils |
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The image shows the Mid-Atlantic Ridge, a submarine volcanic mountain belt that is a key location in the process of: |
Sea floor spreading |
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Which area(s) on this world map is likely to have volcanoes above sea level? |
A |
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Which area(s) on this world map is likely to have earthquakes? |
A, B and C |
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This figure depicts what type of boundary? |
ocean-continent convergent boundary |
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A divergent plate boundary is most likely associated with a(n): |
Mid-Ocean Ridge |
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An oceanic transform plate boundary is most likely associated with a(n): |
Mid-Ocean Ridge |
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A convergent plate boundary is most likely associated with a(n): |
Oceanic trench |
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What types of plate boundaries are shown in this figure? |
divergent and transformation |
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Using the diagram of figures, select the names of the plate boundaries that match the figures going left to right. |
divergent, ocean continent convergent, divergent and transform |
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What occurs at mid-ocean ridges? |
mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary. |
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Mid-ocean ridges are higher than surrounding oceanic crust primarily because: |
The Lithosphere is thinner and hotter |
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The main way new oceanic crust is created is by: |
eruption of lavas and solidification of magmas at depth |
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The stages associated with continental rifting are, in order from earliest to latest: |
Uplift, continental rift, narrow ocean basin, wide ocean basin |
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Which of the following best represents the sequence by which a continent splits apart? |
Uplift due to mantle upwelling, then continental rifting, then seafloor spreading |
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Which of the following contains a modern continental rift? |
Eastern Africa |
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Which of the following is associated with a mid-ocean ridge? |
magma produced as the mantles rise up |
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Where is subduction occurring on this map of South America? |
B |
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On the accompanying figure, which letter is over the youngest oceanic crust? |
D |
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The Earth's magnetic field is generated by: |
movement of iron and electrical currents within Earth's outer core |
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If the area shown in this figure is 240 kilometers wide and the oldest crust is 4 million years old, what was the approximate rate of seafloor spreading across this ridge? |
60 km/my |
