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Worksheets8.E.1.3 & 8.E.1.4 Practice Test
Total questions: 60
Worksheet time: 42mins
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?
0
7
10
3
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.
If a large amount of fertilizer enters a lake, which will most likely happen?
The fish population in the lake will increase.
The temperature of the lake water will increase.
The number of fish dying in the lake will increase.
he available food supply for the fish in the lake will increase.
Which would be the most likely cause of large numbers of fish dying in a stream?
a lack of nitrogen
high levels of mercury
decreased carbon dioxide
low dissolved oxygen concentration
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, which will lead to eutrophication.
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.
The measure of how clear or cloudy a substance is
Salinity
Bioindicator
Turbidity
Eutrophication
The measure of how acidic or basic a substance is
dissolved oxygen
salinity
turbidity
pH
Bio-indicators
A measure of how acidic or how basic a liquid is
An organism used to monitor the health of an ecosystem.
a chemical that includes nitrogen and oxygen, often used as a fertilizer
A measure of how turbid a water system is.
Eutrophication
An organism used to monitor the health of an ecosystem.
Too many nutrients in a body of water frequently due to runoff from the land. It causes a dense growth of plant life and death of animal life from lack of oxygen. (It can cause algal blooms)
amount of oxygen that is present in the water.
measure of how acidic or alkaline a water system is.
Dissolved oxygen
A measure of how clear water is
A fertilizer containing phosphorus compounds
amount of oxygen that is present in the water
measure of how acidic or alkaline a water system.
Rainbow trout are found in mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use rainbow trout in water quality testing?
biological indicator
invasive species
nitrates
Turbidity test
Which factors can have the greatest effect on the health of a river system?
type of soil and salinity
nitrate levels and turbidity
human consumption and pH
natural disasters and tidal change
Which will occur if humans continue to overload water systems with excess nutrients?
chemosynthesis
eutrophication
nitrification
photosynthesis
Which does an increase in eutrophication indicate to scientists studying a body of water?
an increase in fertilizer runoff
a decrease in pollutants from farm runoff
an increase in the health of the body of water
an increase in oxygen levels in the body of water
Which aspect of fertilizer pollution would have the greatest negative impact on an aquatic ecosystem?
Nitrates poison the water that fish breathe through their gills.
Microorganisms in the water absorb all the oxygen, suffocating animals.
Aquatic animals increase, adding producers to the food chain and feeding fish.
Algal blooms deplete the oxygen and block the sunlight from penetrating a body of water.
Which chemical elements in fertilizers pollute stormwater runoff and contribute to excessive plant growth in a water system?
iron and lead
copper and zinc
calcium and magnesium
phosphorus and nitrogen
Why do biologists use indicator species?
to compare freshwater and ocean ecosystems
to count the number of organisms present
to monitor water quality and biodiversity
to analyze the dominant species
Which is the best example of a point source pollution?
runoff from fields
pesticides sprayed into the air
oil spill from a boat on the Atlantic Ocean
smoke from multiple industries in a large city
Pollution that comes from a specific site. If you can point at the pollution.
Non-Point Source Pollution
Point Source Pollution
Run-Off
Bio-Indicators
Water pollution that does not have a specific point of origin. Runoff from land and roads.
Point Source Pollution
Eutrophication
Nitrates
Non-Point Source Pollution
The Clean Water Act is a _______________ law in the United States that regulates water pollution.
Local
State
Federal
Interstellar
What is a Non-Point source Pollution?
Runoff from fertilizer from farms
Acid rain
Damaged Sewer Pipe or system
Salts from irrigation of farm fields
Federal and state governments have passed laws to promote a safe environment. The _____________________ (EPA) is the federal government agency that sets rules and regulations to protect people’s health and the environment in the United States.
England Plant Agency
Environmental Protection Agency
Earthy People Association
Earth Plant Air
Which best explains a way of protecting water for human consumption?
Ban the use of lakes and rivers for recreation.
Allow dumping of some waste into lakes and rivers.
Reduce the use on lakes and rivers for irrigation of crops.
Improve water quality standards for industries located on lakes and rivers.
Available space for crops
After analyzing data collected from a pond, there is significant decrease in dissolved oxygen. Which most likely caused the decline?
an increase in minerals
an increase in sediment
an increase in algae growth
a decrease in fish population
