What initially happens to the water quality in a lake when there is an increase in nitrates?

Which conditions indicate that a water system is healthy?

Why do high nutrient levels reduce water quality for fish and other organisms?

When an algal bloom occurs, what happens to other organisms living in that part of the water?

What effect do waves in a river have on water quality?

What happens to water in the river when excess nutrients from the farmland enter the river?

Dissolved oxygen levels in water sources are dependent on several factors, including temperature and concentration of plant and animal species. Which environment would most likely have the highest levels of dissolved oxygen?

Which example represents a non-point source of pollution?

Which example represents a point source of pollution?

What is the main purpose for adding chlorine during the water treatment process?

What is the best method for the preservation of water quality?

What is the primary difference between the treatment processes for drinking water compared to wastewater?

If all pollution must be caused by a source, how is it possible to have non-point source pollution?

Which best describes a bioindicator?

Why is filtration an important part of water treatment?

Which source of water pollution includes oil and gasoline discharge from automobiles and storm sewer drainage?

What is the relationship between dissolved oxygen and temperature?

What is one way scientists analyze the health of a river?

A landfill is most likely to directly pollute

Which of the following best represents the relationship between dissolved oxygen levels and the mortality(death) rate of aquatic organisms?

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