A force that is important in driving plate tectonics is:

A) slab pull
B) ridge push
C) upwelling mantle, such as in hot spots
D) all of these

The spectrum of electromagnetic radiation released by the sun consists mostly of what type of radiation? 

A)  gamma rays 
B)  ultraviolet waves 
C)  visible waves 
D)  infrared waves

Most groundwater pumped in the United States is used for:

A) industry
B) irrigation
C) drinking water
D) swimming pools

How can livestock growers control runoff of animal wastes from feedlots and barnyards? 

A)  by diverting runoff of animal wastes into detention basins 
B)  by locating feedlots on gently sloping land so rainwater will naturally cleanse the stockyards 
C)  by removing buffers between stockyards and surface water 
D)  by increasing animal density

What is the correct way to calculate change in human population in a particular year? 

A)  (births + immigration) - (deaths + emigration)  
B)  (births + emigration) - (deaths + immigration)  
C)  (deaths + immigration) - (births + emigration)  
D)  (deaths + emigration) - (births + immigration)

Natural gas has a higher net energy ratio than gasoline.

Which of the following is NOT a likely outcome of global warming? 

A)  reduced biodiversity 
B)  higher sea levels 
C)  decreased food production 
D)  more moderate weather

Water pollution threatens wildlife but not the health of human beings.

What is the type of stream transportation by a series of short leaps or bounces off the bottom of the streambed?

A) saltation
B) traction
C) abrasion
D) suspended load

What is carrying capacity? 

A)  the interaction of natality and mortality 
B)  the proportion of males to females 
C)  the maximum size of population that the environment will support 
D)  the reproductive rate