Water Pollution

All of the following are problems that result from the use of pesticides except

• most pesticides are not target-specific and kill other related and non-related species
• pesticide runoff enters surface waters and increases the solubility of heavy metals 
• pesticides affect nontarget organisms by changing community relationships
• pesticides target specific physiological functions, but alsodisrupt other functions

Which of the following statements about non-point source (NPS) pollution is not correct?

• NPS results from rain or snowmelt moving over or permeating through the ground 
• NPS is a form of water pollution that is more difficult t o control, measure and regulate 
• NPS includes sediment from improperly managed construction sites as a pollutant 
• NPS is water  pollution that originates froma distinct source such as a pipe or tank

Which of the following would be an indication that a body of water was contaminated by human wastewater? 

• low BOD and a fecal coliform bacteria count of zero
• high levels of nutrients such as nitrogen and phosphorus, and high BOD  
• low BOD and low levels of nutrients, such as nitrogen and phosphorus 
• low levels of nutrients, such as nitrogen and phosphorus, and a fecal coliform bacteria count of zero

Both septic systems and sewage treatment plants utilize bacteria to break down organic material. Where in each system does this process occur?  

• septic tank and leach field; primary treatment and secondary treatment 
• septic tank only; primary treatment and chlorination 
• leach field only; secondary treatment only 
• septic tank and leach field; secondary treatment only 

What is the name of the type of pollutant where the source is known?

• Point Source
• Non-Point Source

Which of the following would be considered a non-point source pollution:

• A pipe leak
• Fertilizer runoff
• A gas leak from an underground tank

Fertilizer, sewage, and animal feces can wash in to water, leading to... 

• thermal pollution
• artificial eutrophication
• desalination
• biomagnification

Water pollution that comes from a single source is considered...

• point source pollution
• nonpoint source pollution
• thermal pollution
• ocean pollution

Humans use fresh water primarily for: 

• mining and industrial process
• electrical production 
• agricultural irrigation 
• global nuclear power energy production 

Most of Earth's freshwater is in the form of

• clouds
• ice
• rocks
• dirt