Albert chpt 15 + 16 Exam 25 Questions with Verified Answers
What can create divides between adjoining watersheds? - CORRECT ANSWER Ridges
Of at the
... [Show More] water resources on Earth, what percentage is saline? - CORRECT ANSWER 97%
Which communities are characterized by the following?
-organisms adapted to extremely high temperatures and pressure
-chemosynthetic bacteria that convert sulfur compounds to organic molecules - CORRECT ANSWER Hydrothermal vents
In what phase of the hydrologic cycle does water move into the soil? - CORRECT ANSWER Infiltration
What is the main contributing factor to the decrease in evapotranspiration? - CORRECT ANSWER Impervious cover
What is the driving force of the movement of water in the hydrologic cycle? - CORRECT ANSWER The sun
By what process did Earth's ocean gain its dissolved compounds? - CORRECT ANSWER Weathering and runoff
The salinity of water must be...? - CORRECT ANSWER Less than 0.1%
The highest salinity surface water would be expected in which climate zone? - CORRECT ANSWER Subtropical
What is the world's largest biome by area? - CORRECT ANSWER Open ocean
What describes the waters in an upwelling? - CORRECT ANSWER Cold and nutrient-rich
What is the most common cause of salinization of agricultural soils over time? - CORRECT ANSWER Overirrigation
What causes the Gulf of Mexico's Dead Zone? - CORRECT ANSWER Eutrophication
What is 0.1 ppm expressed as a percentage? - CORRECT ANSWER 0.00001%
What are some economic consequences of overfishing? - CORRECT ANSWER -an increase in the cost of fish
-loss of jobs
-threatened food security
The decline of a fish population by 90% of more is known as which of the following? - CORRECT ANSWER Fishery collapse
When a field becomes waterlogged, what consequences could it have on the plants? - CORRECT ANSWER They will die as they are unable to absorb oxygen through their roots
What is the build up of salt in soil leading to a loss in crop productivity called? - CORRECT ANSWER Salinization
What irrigation method uses water with the smallest percentage lost to evaporation? - CORRECT ANSWER Drip irrigation
What is a likely consequence of the irrigation of agricultural land over time? - CORRECT ANSWER Depletion of aquifers in the area
T/F: Excessive irrigation leads to water logging - CORRECT ANSWER True
T/F: evaporation leads to salinization - CORRECT ANSWER True
What are some ways dams affect climate change? - CORRECT ANSWER -hydroelectric dams reduce CO2 emissions
-as vegetation decays beneath reservoirs, it releases CO2 and methane
How does deposited silt in a reservoir affect the ecosystem? - CORRECT ANSWER Silt contains nutrients that become trapped behind a reservoir, the silt absorbs sunlight, warming the water and decreasing dissolved oxygen. Ecosystems downstream are starved of nutrients while the reservoir supports large algal blooms
What effect do dams have on silt flow? - CORRECT ANSWER Silt accumulates in dam reservoirs [Show Less]