Q & A - Science

Q & A

• The thinning of the ozone layer is believed to have begun in The thinning of the ozone layer is believed to have begun in (A) 1890 (B) 1953 (C) 1975 (D) 1981 (E) 1985
• In the year 2000, approximately what percentage of the world's In the year 2000, approximately what percentage of the worlds people lived in the developed (industrialized) countries? (A) 5% (B) 60% (C) 85% (D) 40% (E) 20%
• Approximately how many people are added to the world's population every minute Approximately how many people are added to the worlds population every minute? (A) 64 (B) 140 (C) 320 (D) 1500 (E) 260,000
• The single biggest factor contributing to the increase in the human population for the The single biggest factor contributing to the increase in the human population for the last 300 years has been (A) An increase in the global birth rate (B) A decrease...
• At the present rate of growth, the human population is expected to double in size in At the present rate of growth, the human population is expected to double in size in (A) 2 years (B) 14 years (C) 39 years (D) 78 years (E) 140 years
• Tall smokestacks are not a solution to pollution by coal-burning power plants because Tall smokestacks are not a solution to pollution by coal-burning power plants because (A) They are too expensive to build (B) They dont dispense the pollutants (C) ...
• Nonreplaceable resources at risk of depletion in the United States are Nonreplaceable resources at risk of depletion in the United States are (A) Topsoil, biodiversity, lakes and streams (B) Ground water, forests, and topsoil (C) Groun...
• In the breakdown of the ozone layer In the breakdown of the ozone layer, the ozone (O3) directly reacts with (A) Ultraviolet light (B) Chlorine atoms (C) Oxygen atoms (D) CFC molecules
• The challenges to the promise of plentiful energy produced by nuclear fuel do not include The challenges to the promise of plentiful energy produced by nuclear fuel do not include (A) Terrorism potential (B) Safe operation (C) Safe disposal of spent fuel...
• The best predictor of future population growth rate is The best predictor of future population growth rate is (A) Life expectancy (B) Age structure (C) Mortality (D) Undeveloped land
• Eutrophic lakes are very deep and lack nutrients Eutrophic lakes are very deep and lack nutrients. (A) True (B) False
• Wetlands are among the most naturally fertile areas in the world Wetlands are among the most naturally fertile areas in the world. (A) True (B) False
• Oligotrophic lakes are rich in oxygen, but poor in nutrients and organic materials Oligotrophic lakes are rich in oxygen, but poor in nutrients and organic materials. (A) True (B) False
• The great deserts of the world are a result of the rain shadow effect The great deserts of the world are a result of the rain shadow effect. (A) True (B) False
• Which one of the following is not a biome Which one of the following is not a biome? (A) Taiga (B) Tundra (C) Savanna (D) Desert (E) Estuary
• The greatest variety of organisms in the oceans occurs in the The greatest variety of organisms in the oceans occurs in the: (A) Shallow water (B) Open sea surface (C) Deep sea water (D) B and C (E) None of the above
• Which biome is characterized by heavy rainfall throughout the year Which biome is characterized by heavy rainfall throughout the year, giant emergent trees, sparse ground vegetation, and a great diversity of organisms? (A) Taiga (B) ...
• In the open ocean In the open ocean, ______________ are organisms that are large enough to swim independently and feed on microscopic organisms and each other. (A) Plankton (B) Protist...
• Within lakes, the Within lakes, the ________________ zone lies where light cannot penetrate. (A) Limnetic (B) Littoral (C) Profundal (D) Photic
• The portion of the earth and its atmosphere in which organisms live, and includes the The portion of the earth and its atmosphere in which organisms live, and includes the organisms themselves, is the ________________. (A) Community (B) Population (C...
• Which of the following is not characteristic of the taiga biome Which of the following is not characteristic of the taiga biome? (A) Permafrost (B) Long, cold winters (C) Most of the limited precipitation falls in the summer (...
• Tropical rainforests receive approximately how much rainfall per year Tropical rainforests receive approximately how much rainfall per year? (A) Less than 25 cm (B) 75 to 125 cm (C) 140 to 450 cm (D) 300 to 600 cm (E) Over 500 cm
• Approximately what percentage of the earth's surface is covered by inland lakes Approximately what percentage of the earths surface is covered by inland lakes? (A) 0.3% (B) 1.8% (C) 23% (D) 50% (E) 75%
• What type of organisms are the primary producers in the deep-sea, warm-water vent ecosyste What type of organisms are the primary producers in the deep-sea, warm-water vent ecosystems? (A) Photosynthetic bacteria (B) Crabs and fish (C) Worms (D) Chemosy...
• The deepest parts of the oceans are approximately The deepest parts of the oceans are approximately (A) Three-fourths of a kilometer deep (B) 3 km deep (C) 11 km deep (D) 27 km keep (E) 90 km deep
• What is the name of the event that results in unusual warming of the waters off the coast What is the name of the event that results in unusual warming of the waters off the coast of Peru and has adverse climatic consequences on a global scale? (A) The Humbo...
• Which of the following areas receives little precipitation Which of the following areas receives little precipitation? (A) The equator (B) Near 30o north or south latitude (C) Near 60o north or south latitude (D) All of t...
• The earth radiates heat back to space in the form of The earth radiates heat back to space in the form of (A) Shortwave radiation (B) Longwave radiation (C) Ozone (D) CO2 (E) Lightning
• The warmer, upper layer of water in a lake is called the The warmer, upper layer of water in a lake is called the (A) Thermocline (B) Hypolimnion (C) Nekton (D) Neritic zone (E) Epilimnion
• At least 40% of all photosynthesis in the world is carried out by At least 40% of all photosynthesis in the world is carried out by (A) Photosynthetic plankton (B) Photosynthetic nekton (C) Bioluminescent organisms (D) Doldrums ...
• Compared with terrestrial habitats, the oceans have Compared with terrestrial habitats, the oceans have _______________ species and _______________ phyla. (A) More, More (B) Fewer, Fewer (C) More, Fewer (D) Fewer, ...
• Where would you find coral reefs Where would you find coral reefs? (A) In the epilimnion (B) In the abyssal zone (C) In the profundal zone (D) In the neritic zone (E) None of the above
• Which of the following regions has a Mediterranean climate and is derived from temperate Which of the following regions has a Mediterranean climate and is derived from temperate deciduous forests? (A) North Americas taiga (B) Tropical rainforests (C) No...
• Monsoons are characteristic of Monsoons are characteristic of (A) The coast of Peru (B) India and southern Asia (C) California (D) North Africa (E) Antarctica
• The climate of a particular region is influenced by its The climate of a particular region is influenced by its (A) Solar radiation (B) Latitude (C) Both of the above (D) None of the above
• The deep-water areas of the open ocean are called the The deep-water areas of the open ocean are called the (A) Abyssal zone (B) Hypolimnion (C) Neritic zone (D) Profundal zone (E) Intertidal zone
• Which one of the following terms includes all of the others Which one of the following terms includes all of the others? (A) Habitat (B) Population (C) Biosphere (D) Community (E) Ecosystem
• Comparing the mean biomass of ecosystems in kg/m2, what type of ecosystem has the greatest Comparing the mean biomass of ecosystems in kg/m2, what type of ecosystem has the greatest biomass? (A) Estuaries (B) Cultivated land (C) Tropical rain forest (D)...
• In a stratified lake, the warmer water is separated from the colder water by the In a stratified lake, the warmer water is separated from the colder water by the (A) Photic zone (B) Epilimnion (C) Hypolimnion (D) Thermocline
• Temperate forests include all of the following except Temperate forests include all of the following except (A) Tundra (B) Deciduous forest (C) Evergreen forest (D) Taiga
• Biomes have all of the characteristics listed below except Biomes have all of the characteristics listed below except (A) Includes a large area (B) Uniform habitats (C) A characteristic appearance (D) A common climate
• All of the following are adaptations to high altitude except All of the following are adaptations to high altitude except (A) Increased breathing rate (B) Increased erythrocyte production (C) Increased binding capacity of hem...
• Which of the following are producers Which of the following are producers? (A) Termites (B) Bacteria (C) Algae (D) Grasshoppers (E) All are producers.
• Organisms in trophic level 3 are Organisms in trophic level 3 are: (A) Detritivores (B) Herbivores (C) Carnivores (D) Producers (E) None of the above
• Which one of the following would be a detritivore Which one of the following would be a detritivore? (A) A snake (B) A mouse (C) A bacterium (D) A deer (E) An owl
• Plants reduce atmospheric nitrogen to ammonia Plants reduce atmospheric nitrogen to ammonia. (A) True (B) False
• The food web of any community depends on live producers and detrivores The food web of any community depends on live producers and detrivores. (A) True (B) False
• The conversion of atmospheric free nitrogen gas to ammonia is The conversion of atmospheric free nitrogen gas to ammonia is __________________ and occurs through the activities of certain bacteria and cyanobacteria. (A) Nitrogen f...
• The hydrologic cycle is driven primarily by The hydrologic cycle is driven primarily by ___________________ . (A) Evapotranspiration from plants (B) Rainfall (C) Snowmelt (D) Percolation of water through the soil
• What is true of turnover rates of chemicals in ecosystems What is true of turnover rates of chemicals in ecosystems? (A) Turnover is faster in summer than in winter. (B) Residence time is usually of the order of years for te...