BIO-220 GCU Final Questions And Answers Hydrologic Cycle | Exams Marine Science and Biology | Docsity (2024)

Download BIO-220 GCU Final Questions And Answers Hydrologic Cycle and more Exams Marine Science and Biology in PDF only on Docsity! BIO-220 GCU Final Questions And Answers Hydrologic Cycle - correct answer Water evaporates from moist surfaces, falls as rain or snow, passes through living organisms and returns to the oceans. How much water evaporates each year from the world's oceans? - correct answer 500,000km Three principal factors controlling global water deficits and surpluses: - correct answer Global atmospheric circulation, proximity to water sources, and topography. Rain Shadow Effect - correct answer Cool, dry air descends from the mountaintop down the other side of the mountain (leeward side) creating dry areas with very little precipitation. How much liquid water do the oceans hold? - correct answer 97% Oceans role: - correct answer Play major role in moderating earth's climate. The currents moderate climate by redistributing warm and cold water around the earth. How much of the world's water is classified as fresh? - correct answer 2.4% Groundwater - correct answer Second largest reservoir of fresh water. BIO-220 GCU Final Questions And Answers Infiltration - correct answer Process of water percolating through the soil and into fractures and permeable rocks. Zone of aeration - correct answer Upper soil layers that hold both air and water. Zone of saturation - correct answer Lower soil layers where all spaces are filled with water. Water table - correct answer Top of zone of saturation. Aquifers - correct answer Porous layers of sand, gravel, or rock lying below the water table. Artesian - correct answer Pressurized aquifer intersects the surface (water flows without pumping). Recharge zones - correct answer Areas where water infiltrates into an aquifer. Smallest water reservoirs - correct answer Contains < 0.001% of total water supply. BIO-220 GCU Final Questions And Answers Oligotrophic - correct answer Bodies of water that have clear water and low biological productivity. Eutrophic - correct answer Bodies of water that are rich in organisms and organic material. Cultural Eutrophication - correct answer Increase in biological productivity caused by human activities. Dinoflagellates - correct answer Single-celled organisms that swim with 2 whip-like flagella. Red tides - correct answer Dinoflagellate blooms. Highly toxic metals: - correct answer Mercury, lead, cadmium, tin, and nickel. Clean Water Act - correct answer (1972) Established a National Pollution Discharge System which requires a permit for any entity dumping wastes in surface waters and requires disclosure of what is being dumped. BIO-220 GCU Final Questions And Answers Clean Water Act continued... - correct answer Goal was to return all U.S. surface waters to "swimmable" conditions. Groundwater Pollution - correct answer Occurs when pollution is put on the ground and then slowly sinks to the groundwater (spilling oil). Oil Pollution facts: - correct answer 3-6 million tons of oil are released into the ocean each year. Inorganic Pollutants - correct answer Nonmetallic Salts & Acid. Nonmetallic Salts - correct answer Many salts that are non-toxic at low concentrations can be mobilized by irrigation and concentrated evaporation, reaching levels toxic to plants and animals. 2 most important organic chemical sources: - correct answer 1. Improper disposal of industrial and household wastes. 2. Runoff of pesticides from fields, roadsides, golf courses, and lawns.