Bio 220 Exam 4 GCU Questions And Answers With Verified Tests

Atmospheric Deposition - Answer-the process, long recognized by scientists, whereby precipitation (rain, snow, fog), particles, aerosols, and gases move from the atmosphere to the earth's surface. Biochemical Oxygen Demand - Answer-amount of dissolved oxygen consumed by aquatic microorganisms. Used as a test for organic waste contamination from sewage, paper pulp, and food waste. Clean Water Act (1972) - Answer-National Pollution Discharge System which requires a permit for any entity dumping wastes in surface water and requires disclosure of what is being dumped Consumption - Answer-loss of water due to evaporation, absorption, or contamination Containment - Answer-divert water away from a contaminated site Cultural Eutrophication - Answer-increase in biological productivity caused by human activities Dissolved Oxygen Content - Answer-measure of dissolved oxygen in the water Duckweed - Answer-used in bioremediation and tertiary treatment of water Effluent Sewerage - Answer-a septic tank separates the solids and the liquid is sent to the city water remediation plant Eutrophic - Answer-bodies of water that are rich in organisms and organic material Eutrophication - Answer-process of increasing nutrient levels and biological productivity, a normal part of successional change in most lakes Extraction - Answer-pump out polluted water and treat it chemicallyGroundwater Pollution - Answer-is due to a variety of factors including overuse, deforestation, lack of clean surface water, disruption of recharge zones, and contamination of groundwater. Infectious Agents - Answer-Pathogenic organisms such as viruses, bacteria, fungi, protozoa, and worms. Infiltration - Answer-process of water percolating through the soil and into fractures and permeable rocks Inorganic Pollutants - Answer-mineral acids, inorganic salts, trace elements, metals, metals compounds, complexes of metals with organic compounds, cyanides, sulphates, etc Main source of waterborne pathogens - Answer-improperly treated human waste Natural or Artificial Wetlands - Answer-Takes effluent from the city water treatment plant and uses wetland plants and microorganisms to remove excess nitrogen from fertilizer contaminants and recharges ground water Nonpoint Sources - Answer-scattered or diffuse, having no specific location of discharge Oil Pollution - Answer-oil release and spill into ocean Oligotrophic - Answer-bodies of water that have clear water and low biological productivity