Logging operations used to use a technique called clear-cutting, in which all of the trees in an area are cut down. What type of water pollution will this most likely lead to?

• Toxic

• Sediment

• Nutrient

• Bacterial

A farmer applies excess fertilizer to one of her fields just before a rainstorm. What kind of pollution is this most likely to lead to?

• Toxic

• Sediment

• Nutrient

• Bacterial

A new wastewater treatment plant opens in an area where raw sewage used to be dumped directly into a bay. Which two types of pollution will be reduced the most by the new plant?

• Sediment and bacterial

• Toxic and nutrient

• Toxic and sediment

• Bacterial and nutrient

The introduction of chemical, physical or biological agents into the water is

• Water Pollution

• Potable Water

• Desalination

• Population

At a research lab, a scientist carelessly pours cultures of living microbes down the drain. What type of water pollution does this cause?

• Toxic

• Sediment

• Nutrient

• Bacterial

What is an example of non-point source pollution?

• Unlined landfill

• Runoff from several steel factories

• Waste water from mine

• Leaking tank

Some kids were dumping paint in the local pond. What type of water pollution did they cause?

• Toxic

• Sediment

• Nutrient

• Bacterial

Why is polluted ground water difficult to clean?

• Water cycle happens slowly

• Ground water is shallow in the ground

• Ground water is hard to find

• Water cycle stops when water is polluted

Most of the pollution in the ocean comes from

• Commercial boats

• Leaking tankers

• Oil spills

• Waste from land

Pathogens are -

• Drinkable water

• Chemical pollutants

• Fertilizers

• Disease-causing bacteria or viruses