What term describes the number of different species in a given area?
A. speciation
B. species evenness
C. species niche
D. species richness
E. habitat
Answer: D
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Which force does not have a direct effect on horizontal wind motions?
A) pressure gradient force B) frictional force C) gravitational force D) Coriolis force
Which of the following is the major environmental concern regarding the release of methane from the sea floor to the atmosphere?
A) At least fifty deep-ocean floor sites may contain extensive methane hydrate deposits. B) Methane is created when bacteria break down organic matter trapped in sea floor sediments. C) Release of large quantities of methane from the ocean causes dramatic effects on global climate. D) Sea floor methane seeps support a rich community of organisms that depend on the methane. E) Sudden releases of methane hydrates have been linked to underwater slope failures.
Which of the following statements most accurately describes the current status of China's energy use?
A) Although the source of energy differs, the average resident of China uses about the same amount of energy as the average resident of the United States. B) As a nation, China ranks third in energy use behind only India and the United States. C) China currently has a higher energy intensity than the United States. D) Almost 75% of China's electricity is being produced by hydroelectric plants such as the new Three Gorges Dam recently built along the Yangtze River.
The beach face can have a low region that remains flooded at low tide. This is called a ________.
Fill in the blank(s) with the appropriate word(s).