Water Pollution and Waste Water Treatment

______________________ is the introduction of chemical, physical, or biological agents into water that degrade water quality and adversely affect the organisms that depend on the water.

• water pollution
• desalination
• watershed
• potable

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

• Toxic

• Sediment

• Nutrient

• Bacterial

Dirt, sand and silt are classified as what type of pollution?

• toxins
• sediment
• nutrient
• bacterial

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

This type of pollution comes from any heating of natural water that results from human activity

• Thermal pollution

• Chemical pollution

• Biological pollution

Which of the following is an effect of an oil spill?

• Many plants and animals die.

• The fishing industry improves.

• Plant life increases.

• The oil cleans the beaches.

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 type of pollution is the example:

Water from a river or lake, that is used for cooling powerplants, get warmed up. When that warm water is returned to the river or lake, it is a higher temperature than the river or lake water. This warmer water has less oxygen available for organisms that live in the water.

• Biological pollution

• Chemical pollution

• Thermal pollution

When water is polluted, it means the quality of the water is...

• degraded

• increased

• developed

• upgraded