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WorksheetsWater Ecosystems/ Stewardship
Total questions: 42
Worksheet time: 1hrs 6mins
Increased nitrates (nitrogen fertilizer) in water will:
decrease turbidity.
increase algal bloom.
increase D.O.
increase pH.
The term describing underground layers of rock or sediment which transmit groundwater is called what?
Saturated Zone
Influent Streams
Aquicludes
Aquifers
What is the major difference between porosity and permeability?
Permeability describes the amount of water a rock or sediment layer can hold, and porosity is the ability of the rock or sediment layer to allow water to pass through it.
Its depth has the best potential for a good supply of water.
Porosity describes the amount of water a rock or sediment layer can hold, and permeability is the ability of the rock or sediment layer to allow water to pass through it.
Porosity describes groundwater and permeability describes underground oil and natural gas.
Land area drained by a stream system is known as what?
Tributary
Watershed
River Basin
Aquifer
Water that lies on the surface of the Earth like streams, river, and lakes are considered what?
Surface Water
Groundwater
Aquifer
Flood
How would several wells in a given area affect the balance of groundwater recharge and discharge?
The wells would provide dissolved oxygen.
The wells would increase the water table level by adding water from runoff.
The wells would deplete the groundwater which is usually supplied by percolation from rain.
The wells would provide storage areas for groundwater to maintain the water level.
Nonpoint pollution is hard to control because_____.
it often involves very large volumes of water coming from a single source.
“nonpoint” means that there is no point in trying to control it.
it is caused by small amounts of pollution from many places.
it contains high levels of pathogens.
Most nonpoint pollution comes from_______.
water put back into lakes and rivers by wastewater treatment plants.
untreated stormwater flow (runoff) draining from paved areas and farm fields.
slowly moving nutrient-rich water.
phosphorus in laundry detergents.
Human (as a whole population) use freshwater primarily for_________.
Agricultural (animal and crop farming)
Drinking and Cooking
Mining and Industrial Processes
Electrical Production
If excessive amounts of hot water are discharged into a lake, the immediate result will most likely be...
an increase in sewage content
a decrease in the amount of dissolved oxygen in the lake
an increase of mercury in the lake
a decrease in nitrates
storm water
infiltration
Macroinvertebrates such as stoneflies, mayflies and water boatmen (AKA bioindicators) require high levels of dissolved oxygen and their abundance is an indication of:
Poor water quality
Good water quality
Don't tell us anything about water quality
Invertibrates don't tell us anything about water quality
Eutrophication is characterized by...
low nutrients, low oxygen
low nutrients, high oxygen
high nutrients, low oxygen
high nutrients, high oxygen
Why is the salinity level constantly changing in an estuary?
salt is continually added to the watershed in the form of acid rain
the salt water from the ocean and fresh water from the watershed are constantly mixing
estuaryies evaporate at an unusually fast rate leaving more salt behind, but then the rains come and dilute the water
because they are so high up in the watershed, near the mountain rainges
Which best explains the importance of estuaries?
Estuaries are freshwater areas that support a large amount of living things.
Estuaries are areas where freshwater and salt water collide, resulting in a large amount of biodiversity.
Estuaries are tropical areas that support an abundance of life found usually in cold regions of the ocean.
Estuaries are nutrient-rich areas because they have large amounts of carbon dioxide seeping into the water from the ground below.
Water that flows along Earth's surface to eventually return to the ocean is called ___.
Runoff
Storm drain
Surface water
Tributary
Circulating water (upwelling) in lakes and ponds is important for distributing
heat
oxygen
nutrients
all of these
The higher the temperature, the more dissolved oxygen in water.
True
False
Which would MOST LIKELY result in an unhealthy aquatic habitat?
a decrease in turbidity
a decrease in nitrates levels
an increase in water temperature
an increase in dissolved oxygen levels
Pure water is neutral. If water is neither an acid nor a base, what is the pH of water?
3
7
9
14
Which best describes the relationship between temperature and dissolved oxygen in a lake?
As temperature increases, dissolved oxygen increases.
As temperature increases, dissolved oxygen decreases.
As temperature decreases, dissolved oxygen decreases.
A change in temperature has no effect on dissolved oxygen.
Which best explains why a scientist would use nets to capture and count organisms in a river?
to measure pH
to measure turbidity
to measure biodiversity
to measure temperature
What does pH measure?
acidity/alkalinity
dissolved oxygen
nutrient level
turbidity
Which is the greatest impact of large quantities of sediment flowing into North Carolina’s rivers and streams?
Sediment poisons fish.
Sediment prevents light from reaching plants.
Sediment interferes with the ability for fish to find mates.
Sediment increases the depth of rivers and streams, reducing the amount of flowing water.
Turbidity measurements were taken at different distances from the shore of a lake.
Which best explains why the turbidity increases as water samples are taken closer to the shore?
Shoreline erosion causes sediment to wash into the lake.
Sediment is carried from the middle of the lake to the shore by wind.
Swimmers stir up sediment by splashing in the water near the shore.
Fish stir up sediment while feeding on plants that grow close to the shore.
Which glass contains water with high turbidity?
Glass 1
Glass 2
pH greater than 7 is considered to be
neutral.
basic.
acidic.
polluted.
pH value of less than 7 is considered to be
polluted.
basic.
like drain cleaner.
acidic.
lye
