 |
1 | |
The oceans cover about 55% of the earth's surface. |
| | A) | T |
| | B) | F |
|
|
2 | |
The Pacific Ocean is the deepest ocean because of its subduction zones. |
| | A) | T |
| | B) | F |
|
|
3 | |
The Pacific, Indian, and Atlantic Oceans are all connected around Antarctica in a body of water termed the Southern Ocean. |
| | A) | T |
| | B) | F |
|
|
4 | |
The Arctic Ocean is a major ocean basin that is cut off from all others. |
| | A) | T |
| | B) | F |
|
|
5 | |
Density is calculated by dividing a substance's volume by its mass. |
| | A) | T |
| | B) | F |
|
|
6 | |
The Earth's innermost layer, or core, consists mainly of solid and liquid granite. |
| | A) | T |
| | B) | F |
|
|
7 | |
Oceanic crust consists mainly of basalt and is denser than continental crust. |
| | A) | T |
| | B) | F |
|
|
8 | |
The San Andreas fault in California is an example of a spreading center. |
| | A) | T |
| | B) | F |
|
|
9 | |
The Himalayan Mountains formed from the collision of a seafloor and a continental plate. |
| | A) | T |
| | B) | F |
|
|
10 | |
The Aleutian Islands formed from the collision of two seafloor plates. |
| | A) | T |
| | B) | F |
|
|
11 | |
In general, the seafloor crust is much older than the continental crust. |
| | A) | T |
| | B) | F |
|
|
12 | |
Lithogenous sediments arise mostly from physical and chemical weathering of continents. |
| | A) | T |
| | B) | F |
|
|
13 | |
Most of the deep-sea sediments are gravel and sand because these heavier sediments roll down the continental slopes to the deep more easily than silt or clay. |
| | A) | T |
| | B) | F |
|
|
14 | |
Siliceous sediments are biogenous oozes formed mostly from shells of microscopic organisms. |
| | A) | T |
| | B) | F |
|
|
15 | |
Sea levels are higher during ice ages due to the large number of glaciers entering the oceans. |
| | A) | T |
| | B) | F |
|
|
16 | |
Because they lack subduction zones, the east coasts of North and South America have more flat coastal plains than do the west coasts. |
| | A) | T |
| | B) | F |
|
|
17 | |
In the Hawaiian island chain, the islands are older the farther west they are. |
| | A) | T |
| | B) | F |
|
|
18 | |
Hot spots, which create volcanoes, are always found on spreading-center ridges. |
| | A) | T |
| | B) | F |
|
|
19 | |
Hydrothermal vents form at rift valleys of mid-ocean ridges from seawater that seeps into crustal cracks and is heated by hot mantle material. |
| | A) | T |
| | B) | F |
|
|
20 | |
Black smokers are chimney-like deposits formed when molten seafloor basalt emerged at a rift valley and cooled upon contacting seawater. |
| | A) | T |
| | B) | F |
|
|
21 | |
Evidence for continental drift and plate tectonics includes |
| | A) | geological features in the Americas and in Asia that line up on opposite sides of the Pacific. |
| | B) | seafloor rocks that are older the farther they are from the crest of a mid-ocean ridge. |
| | C) | magnetic anomalies in stripes parallel to the continents' major mountain ranges. |
| | D) | both a and b. |
|
|
22 | |
An example of a subduction zone is |
| | A) | the East Pacific Rise. |
| | B) | the San Andreas Fault. |
| | C) | the Mariana Trench. |
| | D) | the seafloor bordering eastern South America. |
|
|
23 | |
About 200 million years ago, all continents were fused together in one continent called |
| | A) | Gondwanaland. |
| | B) | Pangea. |
| | C) | Panthalassa. |
| | D) | Laurasia. |
|
|
24 | |
The biologically richest part of the seafloor is |
| | A) | the continental shelf. |
| | B) | the continental slope. |
| | C) | deep-sea fans. |
| | D) | the abyssal plain. |
|