Exam 2 multiple examples (2)

1) What country has the most people per hectare of cropland? 2) Which uses the most fertilizer per area of cropland? 3) What type of food production is still most like hunter- gatherer societies? 4) About 11% of the Earth’s surface (excluding Antarctica) is under agriculture. In simple terms, if the world’s human population doubles in the future, then either the total agricultural acreage must double or else __________ must double. 5) Aquaculture refers to: 6) What single invention had the greatest impact on the environment? 7) How quickly is soil typically formed? 8) Which of the following is the most efficient way to reduce soil erosion? 9) Major symptoms of desertification include: 10) Which is NOT a soil conservation measure? 11) What does introduction of the "terminator gene" do? 12) How much topsoil has the US lost so far? 13) Which of the following practices helps in soil conservation and fertility? 14) Which of the following is not a cause of desertification? 15) In a soil profile, the ______ includes both mineral and organic materials 16) Clear-cutting a forest in Pennsylvania would do which of the following to the water table? 17) If we "fish down the marine food web", we 18) Open ocean marine nature preserves are located… 19) Fisheries are concentrated in: 20) In the United States, the single sector which consumes the greatest portion of water supplies is: 21) In the United States, the single sector which utilizes the greatest portion of water supplies is: 22) How much of the flow of the Colorado River is allocated for use by U.S. states and Mexico? 23) Which is an issue pertaining to bottled water? 24) What is an aquifer? 25) The Colorado River is noteworthy because: 26) What will happen if we stop building new dams? 27) Which does NOT result in a loss of fresh water resources to the ocean? 28) Floodplains have all of the following advantages for urbanization and construction except : 29) If a land developer destroys a wetland to build a shopping mall, what must it do by law? 30) If a land developer destroys a wetland to build a shopping mall, what should it do ecologically? 31) Coastal areas are susceptible to saltwater intrusion into groundwater. Saltwater intrusion usually becomes a threat when: 32) True or False : A lake or river is the surface expression of the water table. 33) Dam building in the 20th century led to what? 34) How does water get from the ocean to the atmosphere? 35) The rivers that fed it were diverted to irrigate the desert, so this internally-draining lake began to shrink. 36) What would you expect of a house built on a floodplain? 37) The problem with the Colorado River is that... 38) Which of the following is a potential contaminant of water resources? 39) A lake or pond characterized by degraded water quality and reduced dissolved oxygen (such as caused by a major algal bloom) is considered 40) What state receives the most acid rain? 41) The common test for the potential for disease transmission in water is: 42) Massive and rapid algae growth is stimulated by the addition of __________ to surface water bodies. 43) Where does most of the acid mine drainage problem in Pennsylvania stem from? 44) Why is water so easily polluted? 45) What is the most effective way to remove Cryptosporidium from public water supply? 46) If the rate of carbon dioxide emissions is reduced and stabilized at 1990 rate then the concentration of carbon dioxide in the atmosphere will 47) What will happen if we stop building new dams? 48) Dust storms are NOT caused by 49) Why are top predators most vulnerable to toxins? 50) What toxic chemical is included in “Agent Orange?” 51) What is a watershed? 52) Where does most of the acid mine drainage problem in Pennsylvania and West Virginia stem from?