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Marine Science Ch 17
Ch 17 Review MCs
| Question | Answer |
|---|---|
| What allocates resources? | supply and demand |
| What is considered to be the world's most important marine product? | algin |
| What tools do fishermen now employ to locate schools of fish? | satellite sensors, aerial photography, scouting vessels, and sonar |
| How is freshwater obtained as a marine resource? | desalination |
| What is the fastest-growing mariculture production? | shrimp |
| Why does oil seep to the surface from its source rock? | it is less dense than the surrounding sediments |
| What marine resource has been rendered uneconomical due to the cost of excavation? | manganese nodules |
| Why is the extraction of wind so effective over or near the ocean? | less stuff to get in the way; more steady |
| What is the petroleum found in marine sediments likely to have been formed from? | plankton |
| How much of the world's table salt is produced by the evaporation of seawater? | 1/3 |
| Geologists use _______ to view sediment layers, depth, and possible reservoir structures. | sound reflected off subsurface structures |
| What is the second most valuable marine resource? | sand and gravel |
| In theory, what are free-market economies based upon? | pure competition |
| What is the fastest-growing energy alternative to oil? | wind power |
| What legislative policy reduced the number of dolphin deaths associated with tuna fishing? | U.S. Marine Mammals Protection Act |
| How much of the world's crude oil is found on the seafloor? | 35% |
| When did the harvesting of commercial whale species cease? | 1987, when it became uneconomical |
| What did the United States Exclusive Economic Zone exclude from the original 1982 United Nations Treaty? | provision of shared high seas resources |
| Which United States location contributes to most of the exploitable sand? | Alaska |
| What is the main species of whale targeted by the Japanese and Norwegian whalers? | minke |
| What is not true of territorial waters? | bullets on separate paper |
| What kind of resource is waste disposal? | a nonextracted resource |
| What type of net has been particulary disruptive in the mistargeting of species? | drift net |
| What was first created in an effort to claim the continental shelf as belonging to the nation it was attached to? | Law of the Sea |
| What is the largest known reservoir of hydrocarbons on Earth? | methane-laced ice crystals or methane hydrate |
| What is bycatch? | animals that are unintentionally killed |
| Who is responsible for the consumption of approximately a quarter of the global oil supply? | United States |
| How much of the fish stocks are considered to be overfished? | 65% |
| Why is methane hydrate not harvested for energy use? | it is expensive, dangerous, and disappears very fast |
| When a resource is present in a fixed amount, it is said to be: | nonrenewable |
Created by:
Koolia101