Water Quality

Which is NOT a measure of water quality?

• acidity

• density

• turbidity

• dissolved oxygen

Which human activity can have the most negative effect on water quality?

• farming

• swimming

• catching a fish

Which is an example of point-source pollution?

• a city's air pollution

• a factory's wastewater

• a farm's runoff

Nitrates can cause algal blooms. What is true of nitrates?

• they improve water quality

• they are often from only one farm

• they are nonpoint-source pollution

What happens as the temperature of a lake increases?

• the turbidity stays the same

• the number of fish increases

• the amount of dissolved oxygen decreases

What happens as the amount of sediment in water increases?

• the turbidity stays the same

• the turbidity decreases

• the turbidity increases

A river has NO pollution-intolerant fish. What does this tell you about the water quality of the river?

• the water quality is poor

• turbidity will increase

• acidity has not changed

What is turbidity?

• the cloudiness of the water

• how much acid is in the water

• how much runoff is in the water

• how many fish are in the water

What is in water that fish need to breathe?

• nitrogen gas

• carbon dioxide

• dissolved oxygen

• nitrates

What is the process by which nitrates get into water?

• evaporation

• condensation

• transpiration

• runoff