Residence time is the ____
A) same for all elements in the ocean
B) average length of time an element spends in the ocean
C) length of time it takes an element to dissolve in the ocean
D) same as mixing time
B
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In the developing world, the major deterrent to lowering birth rates is ________.
A. contraception B. economic consequences C. coercion D. education
What evidence first indicated to scientists that the continents were once connected?
a. the apparent jigsaw-like fit of continents together, as in the case of South America and Africa b. the distribution of coal from tropical swamps of the past among North America, Europe, northern Africa, and Asia c. deformed igneous rocks in Brazil that highly resembled similar rocks in Africa d. the presence of Glossopterison fossils on five different continents e. the evidence of past isthmian links which allowed land animals to reach other landmasses across the ocean
The Law of the Sea treaty established a exclusive economic zone of ________ nautical miles from all land within a nation, including islands
A) three B) twelve C) nineteen D) two hundred E) three hundred seventy
You are the chief executive officer (CEO) of a large bus company that transports passengers long distances across the United States
You want to be environmentally "friendly" and are considering replacing your older buses with those that run on hydrogen fuel. However, your executive board dislikes the idea. Which one of the following arguments is valid and could be used by the board to dissuade you from adding hydrogen-fueled buses to your fleet? A) Hydrogen vehicles are actually more polluting than gasoline-powered buses, so the environmentally friendly thing to do would be to add gasoline-powered buses to the fleet. B) Hydrogen vehicles are unsafe and have been known to spontaneously combust when rear-ended. C) Hydrogen vehicles have a range of only around 50 miles, and they take hours to refuel, so hydrogen buses would not be a wise choice for vehicles traveling across the country. D) It may be difficult along some bus routes to find gas stations that sell hydrogen fuel.