Water Quality Parameters

What is associated with high BOD (Biological Oxygen Demand)?

• High plant and animal biodiversity

• High levels of dissolved oxygen

• An overabundance of aerobic bacteria

• Low nutrient levels

What does Biochemical Oxygen Demand measure?

• The amount of oxygen consumed by organic matter

• The water temperature

• How salty the water is

• How dirty the water is

In the digestive tract of what types of animal can you find the fecal coliform E. coli?

• Birds

• Fish

• Mammals

• Insects

Why is it difficult to monitor coliform in water?

• there is so much of it

• it is not found in water

• it runs away

• there is so little of it

Which of the following most influences the levels of coliform?

• driving cars

• poorly maintained sewage systems

• atmospheric temperature

• how fast seaweed moves

Which illness is caused by high fecal coliform contamination?

• Common cold

• Typhoid fever

• Black Plague

• Rabies

Most dissolved oxygen in bodies of water comes from...

• The Atmosphere

• Nearby trees

• Aquatic animals

• Coliform

What is a source of dissolved Oxygen?

• Algae and rooted aquatic plants through photosynthesis

• Grazing cows and chickens

• Branches that have fallen in the water

• Waves and tumbling water mix oxygen from the atmosphere

What do nitrates do for organisms?

• Enhances their color and stripes

• Build protein

• Clean particles in water

• Makes them toxic to predators

What is a source of nitrates in water?

• fertilizers

• paint

• high temperature

• lead and other metals