E/E Week 6 (hydro- fresh) GRADE QUESTIONS
AND ANSWERS
Eutrophication - (correct answer)Process by which a body of water becomes too rich in
dissolved nutrients, leading to plant growth that depletes oxygen
Thermal pollution - (correct answer)Harm to lakes and rivers resulting from the release
of excessive waste heat into them
Effluent - (correct answer)liquid flowing out (often waste)
Nonpoint source pollution - (correct answer)pollution that comes from many sources
rather than from a single, specific site
point source pollution - (correct answer)Pollutants discharged from a single identifiable
location (e.g., pipes, ditches, channels, sewers, tunnels, containers of various types).
brackish water - (correct answer)A mix of freshwater and seawater which commonly
occurs in estuaries where a river enters the ocean
saltwater intrusion - (correct answer)Movement of salt water into freshwater aquifers in
coastal and inland areas as groundwater is withdrawn faster than it is recharged by
precipitation.
Estuaries - (correct answer)the tidal mouth of a large river, where the tide meets the
stream.
Watershed - (correct answer)An ecosystem where all water runoff drains into a single
body of water
AND ANSWERS
Eutrophication - (correct answer)Process by which a body of water becomes too rich in
dissolved nutrients, leading to plant growth that depletes oxygen
Thermal pollution - (correct answer)Harm to lakes and rivers resulting from the release
of excessive waste heat into them
Effluent - (correct answer)liquid flowing out (often waste)
Nonpoint source pollution - (correct answer)pollution that comes from many sources
rather than from a single, specific site
point source pollution - (correct answer)Pollutants discharged from a single identifiable
location (e.g., pipes, ditches, channels, sewers, tunnels, containers of various types).
brackish water - (correct answer)A mix of freshwater and seawater which commonly
occurs in estuaries where a river enters the ocean
saltwater intrusion - (correct answer)Movement of salt water into freshwater aquifers in
coastal and inland areas as groundwater is withdrawn faster than it is recharged by
precipitation.
Estuaries - (correct answer)the tidal mouth of a large river, where the tide meets the
stream.
Watershed - (correct answer)An ecosystem where all water runoff drains into a single
body of water
