SOLVED

21) The aerated zone ________. A) lies above the water table B) pore spaces are filled with water C) is a well-oxygenated, shallow aquifer D) lies below the capillary fringe zone 22) For unconfined aquifers, what hydrologic factor is approximated by the slope of the water table? A) porosity head B) hydro competency C) affluent decline D) hydraulic gradient 23) An aquifer is ________. A) the porous and permeable, saturated cone of depression in an aquitard B) a layer or stratum in which groundwater flows downward to the water table C) a saturated, porous, and permeable layer or stratum D) an unsaturated, influent-flow bed or stratum below a spring 24) ________ would have the largest capacity to naturally remove sewage pollutants. A) Fractured granite B) Well-sorted, coarse gravel C) Slightly clayey sand D) Limestone with solution channels and caverns 25) What force pushes groundwater from pore to pore below the water table? A) integrated saturation impulse B) permeability steepness C) pressure gradient or hydraulic gradient D) seepage affluence actor 26) Which of the following describes the configuration of an unconfined water table around a pumping well? A) depressional withdrawal B) upside-down siphon C) cone of depression D) inverted cone head 27) A disappearing (sinking) creek is ________. A) an influent stream in a karst area B) a stream that downcuts below the water table C) a creek that originates as a large spring flowing from a cave D) a small creek flowing downslope to the top of a perched water table 28) Which one of the following concerning stalactites and stalagmites is not true? A) Stalactites are deposited from water dripping from the ceiling of an aerated cavern. B) Both are composed of calcium carbonate. C) Both are forms of dripstone; stalactites hang from the ceiling, stalagmites grow upward from the cavern floor. D) Stalagmites form on the floors of caves below the water table. 29) Which one of the following concerning artesian wells is not true? A) The well penetrates an aquifer overlain by an aquitard. B) The well penetrates an aquifer underlain by an impermeable bed. C) The aquifer is generally inclined, and it is saturated to an elevation above the point where the well penetrates the aquifer. D) When the well penetrates the aquifer, the water rises to the bottom of the aquitard above the aquifer. 30) ________ is the volume of voids or open space in a rock or unconsolidated material. A) Permeability B) Space yield C) Porosity D) Saturation index 31) The term karst topography was first used in ________. A) the Republic of Slovenia, a province of the former Yugoslavia B) eastern Canada in areas of fractured igneous and metamorphic rocks C) India near the southern foothills of the Himalayan Mountains D) Australia for the extremely dry interior area near Ayres Rock and Alice Springs 32) Which one of the following is not a speleothem? A) geyserite B) dripstone C) stalactite D) stalagmite 33) An unconfined water table is the ________. A) boundary between the saturated zone above and partly saturated zone below B) bottom boundary surface of the saturated zone above an aquitard C) boundary between the aerated zone above and saturated zone below D) boundary between the aerated and unsaturated zones 34) Which of the following best describes how geysers erupt? A) Water suddenly boils in disconnected voids and cracks above the water table, causing the aquifer to explosively fragment. B) Water slowly boils in a network of vertical cracks above the water table, sending up a plume of steam and hot water. C) Water below the water table slowly boils in a vertical crack or natural conduit, causing a plume of condensed water vapor to rise above the vent. D) With a slight reduction in pressure, water in a saturated, natural conduit suddenly boils, sending a plume of steam and hot water into the air above the vent. 35) Where are the most extensive geothermal features in the world? A) Yosemite National Park, United States B) Geysers Artesian Park, Japan C) Iceland’s Groundwater Preserve D) Yellowstone National Park, United States