Water Quality

What is the healthiest combination listed?

• low pH, high nitrates, neutral temperature
• low temperature, neutral pH and low nitrates
• as many nitrates as possible, low temp and low pH
• high temp, high nitrates and high pH

High turbidity means.....

• very clear water
• neutral pH
• very murky or cloudy water
• high nitrates

If water temperature goes UP, what happens to the level of Dissolved oxygen?

• It goes up

• It goes down

• It stays the same

• It increases exponentially

What piece of equipment did we use to measure turbidity?

• a chemical test

• bioidicators

• a turbidity tube

• turbidity sensor by measuring light scattered by the sample at 90 degrees

Which water quality indicator will be most impacted by burning fossil fuels and air pollution?

• nitrates
• pH (water will be more acidic)
• Dissolved oxygen
• turbidity

What two agriculture nutrients cause the greatest problems in surface waters? (lead to algae growth and depleted O₂)

• oxygen and nitrogen

• nitrogen and phosphorus

• hydrogen and nitrogen

• helium and phosphorus

What is the measurement system used to indicate the concentration of hydrogen ions in a solution; ranges from 0 to 14

• pH scale

• turbidity

• potability

• phosphates

Usually found in fertilisers and can cause serious water quality issues when running into a body of water.

• dissolved oxygen

• phosphates

• substrate

• salinity

Which is an effect of chlorine in water?

• kills the microorganisms

• improves the taste

• aerates the water

• improves the clarity of the water

Water that fills the cracks and spaces in underground soil and rock layers is called

• salt water
• rainwater
• groundwater
• water vapor