Water Quality Indicators

What are the three main types of variables that determine the health of a water system?

• Physical, Chemical, Biological

• Physical, Chemical, Mechanical

• Biological, Chemical, Electrical

• Physical, Electrical, Biological

Which of the following is a physical factor affecting water system health?

• pH

• Fish

• Temperature

• Nitrates

What is the main concern about freshwater?

• It is too salty

• It is the main source of water for humans and animals

• It is too warm

• It is too cold

What does high turbidity indicate about water?

• It is safe to drink

• It is not potable

• It is very cold

• It is very salty

Which organisms are affected by the temperature of water?

• Only fish

• Only plants

• All organisms

• Only insects

What can increased water temperature cause in terms of sediment?

• Less sediment dissolves

• More sediment dissolves

• Sediment remains unchanged

• Sediment evaporates

What is the role of dissolved oxygen in water?

• It increases salinity

• It supports aquatic life

• It decreases pH

• It increases turbidity

What can cause changes in the variables affecting water system health?

• Only natural forces

• Only man-made forces

• Both natural and man-made forces

• Neither natural nor man-made forces

What is the relationship between temperature and dissolved oxygen in water?

• Higher temperature increases dissolved oxygen

• Higher temperature decreases dissolved oxygen

• Temperature has no effect on dissolved oxygen

• Temperature doubles dissolved oxygen

What is the preferred temperature range for organisms in water?

• Any temperature

• A specific range where they thrive

• Only very cold temperatures

• Only very hot temperatures