How did the Gulf of Mexico form?

A) loading of thrust sheets of the Appalachian and Ouachita Mountains
B) a large meteoroid impact that formed a crater the same size as the present-day gulf
C) back-arc spreading behind the Lesser Antilles arc
D) Mesozoic Jurassic) continental rifting and seafloor spreading

Which option is most effective for dealing with nondegradable pollutants? 

A)  Keep them from getting into the environment. 
B)  Remove them from contaminated air. 
C)  Remove them from contaminated water. 
D)  Remove them from contaminated soil.

Which energy approach most improves the quality of the environment? 

A)  better energy efficiency 
B)  use of hydrogen gas 
C)  use of clean biomass 
D)  use of wind energy

What are the two most important factors determining the climate of an area? 

A)  ocean currents and light 
B)  temperature and precipitation 
C)  precipitation and light 
D)  temperature and ocean currents

What is provided by disturbances of most terrestrial ecosystems? 

A)  increased biodiversity and opportunities for late successional species 
B)  stabilized biodiversity and opportunities for early successional species 
C)  increased biodiversity and opportunities for early successional species 
D)  stabilized biodiversity and opportunities for late successional species

Which of the following terms is used to describe a legal action that is filed on behalf of larger number of citizens who all allege that they have suffered similar damages? 

A)  a civil suit 
B)  a legal consensus 
C)  a mass injunction 
D)  a class action suit