W
Which will most likely happen to a pollution-sensitive indicator species if there is a SUDDEN increase in pollution?
There will be a significant decrease in the population numbers
Which water temperature range is WORST for aquatic life?
35 degrees C- 40 degrees C
Which is the best example of point source pollutants?
Oil spills and factory wastes
Which of the following is the best example of how to show good stewardship of water?
Reducing water usage through conservation measures
Which government agency is most responsible for setting standards for the concentration levels of harmful substances in the nation's water sources?
The Environmental Protection Agency
A lake is exposed to runoff carrying lots of nitrates and phosphates from farms. How would the lake most likely look?
murky and full of algae
Which aspect of water quality is most likely to be directly affected by acid rain?
pH
Rainbow trout are found in the mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use of rainbow trout in water quality testing?
bioindicator species
Which action shows the best example of good stewardship of resources?
Conserving water by reducing consumption in homes, schools, and businesses
In which way could humans prevent a non-point source of water pollution in North Carolina?
Reduce the amount of fertilizer used in fields
Why does a cloudy river produce less plant life than a clear river?
The cloudiness blocks the sunlight and prevents photosynthesis
As sediment is washed into a river, its depth can be changed, making it shallower. Which aspect of water quality is most likely changed now that the water is shallower?
temperature
Which can lead to a sudden decrease in the amount of dissolved oxygen in a lake or pond?
fertilizer runoff
When is the conservation of the water supply most urgent?
When living through a drought
Which of the following lists the steps of water treatment in the correct order?
Water collection, coagulation, sedimentation, filtration, disinfection
Ammonia is a basic chemical found in animal wastes. Which of the following could be the pH of a river near a farm after a rainstorm?
8, 9, 10, 11, 12 13, or 14
Which aspect of water quality is most affected by changes in temperature?
Dissolved oxygen
How do algal blooms affect the health of a water system?
They can block sunlight and their decomposition decreases dissolved oxygen in the water, decreasing the water quality
Why does the EPA consider it okay to have small amounts of toxic chemicals, such as lead, in drinking water?
In small enough amounts determined by the EPA, toxic chemicals are not harmful to the human body
Which household change demonstrates the best stewardship of water?
Switching to low flow showerheads
What is the relationship between temperature and dissolved oxygen?
A decrease in temperature causes an increase in the dissolved oxygen level
Which factors can have the greatest effect on the water quality of a river?
Temperature and turbidity
Hog farming is a major source of revenue in North Carolina and one of the biggest polluters. Why is this form of water pollution hard to control?
It is a non-point source pollution
A company wishes to build a major golf resort above an aquifer. The company is granted permission to build the resort, but the builders must follow specific laws and regulations during the construction of the resort. Why have the laws and regulations most likely been established?
To minimize the impact of pollution on the environment
What are 3 ways to improve water quality?
reduce use of pesticides, reduce use of fertilizers, increased laws, picking up trash, reduce sediment runoff from job sites