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1 | |
Continental plates are believed to move because of which of these causes? |
| | A) | New volcanic rock pushes them away from spreading centers. |
| | B) | Cooling lithosphere becomes dense, sinks, and pulls a plate with it. |
| | C) | Plates crack along fault lines. |
| | D) | The mantle is fluid and carries plates along with it. |
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2 | |
To find the oldest rocks in the ocean, where should you look? |
| | A) | at hydrothermal vents |
| | B) | near trenches |
| | C) | on top of mid-ocean ridges |
| | D) | near volcanoes |
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3 | |
Which is not true of the Pacific? |
| | A) | Its area is equal to that of the Indian Ocean. |
| | B) | It contains the deepest trench. |
| | C) | It is geologically the newest ocean. |
| | D) | It contains island arcs. |
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4 | |
Since the break-up of Pangaea, which of the following has occurred? |
| | A) | an equal distribution of land north and south of the equator |
| | B) | a gradual drift of many southern landmasses to the north |
| | C) | a change in the overall ratio of land to ocean |
| | D) | a gradual filling of deep ocean basins by ancient sediments |
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5 | |
The Earth's magnetic field is thought to be due to which of these? |
| | A) | sea floor spreading |
| | B) | movement of the crust |
| | C) | currents carrying iron from the core to the crust |
| | D) | movement of the outer core |
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6 | |
If you drop a camera at random to the deep-sea floor, you are likely to see which of these? |
| | A) | steep ridges |
| | B) | thick mineral deposits |
| | C) | canyons |
| | D) | lots of red clay |
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7 | |
Deep-ocean drilling is useful for studies of |
| | A) | changes in the Earth's climate. |
| | B) | mineral deposition at black smokers. |
| | C) | modern down-slope sediment transport. |
| | D) | mountain formation. |
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8 | |
Because of its location, which would be true of a moon of the planet Jupiter? |
| | A) | It cannot have any water. |
| | B) | All of its water must be frozen. |
| | C) | All of its water has boiled away. |
| | D) | Its water sank into its core. |
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9 | |
At the San Andreas Fault, which is happening? |
| | A) | Volcanoes are forming. |
| | B) | Two plates are colliding. |
| | C) | One plate is moving under another. |
| | D) | Two plates are sliding past each other. |
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10 | |
Which is true of the Tethys Sea? |
| | A) | It gave rise to the Arctic Ocean. |
| | B) | It formed between North and South America. |
| | C) | Today, it is located on the eastern coast of Asia. |
| | D) | It was home to may shallow-water organisms. |
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11 | |
The Hawaiian Islands are not considered to be a true island arc because of which of these reasons? |
| | A) | They are not associated with a trench. |
| | B) | They form a mixture of old to young islands within the chain. |
| | C) | All of them are very old. |
| | D) | There are no seamounts at the older end of the chain of islands. |
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12 | |
If you want to find the oldest fossils of life on Earth, you will have to look where? |
| | A) | in trenches |
| | B) | at spreading centers |
| | C) | on land |
| | D) | in basalt |
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13 | |
Carbonate chimneys are found in which areas? |
| | A) | at mid-ocean ridges |
| | B) | where the temperature reaches 350 degrees C |
| | C) | where seawater reacts with new oceanic crust |
| | D) | in trenches |
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14 | |
Which of these features can be found off the eastern coast of the United States? |
| | A) | trench |
| | B) | oceanic rise |
| | C) | submarine canyon |
| | D) | guyot |
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15 | |
Unlike an ocean, which is true of a sea? |
| | A) | It connects with the Southern Ocean. |
| | B) | It is always cut off from the World Ocean. |
| | C) | It is older than the oceans. |
| | D) | It is more shallow. |
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