Week #7: Water Quality Review

We often use bio-indicators to measure the quality of water. What is a bio-indicator?

• any living creature

• eutrophication

• an organism sensitive to its environment

• a turbidity tube

One type of bio-indicators are macroinvertebrates. What is a macroinvertebrate?

• large enough to be seen without a microscope with no backbone (bugs)

• any organism

• organisms that must be viewed under a microscope (microscopic)

• pH

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

Tags

NGSS.MS-LS1-5

High turbidity means.....

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

What is the END result of eutrophication?

• More algae

• decreased oxygen and fish kills

• less turbidity

• a new pond

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

• It goes up
• It goes down

Tags

NGSS.MS-PS3-4

pH is the measurement of

• how acidic or basic a solution is.

• just the acidity of a solution.

• how acidic or basic the atmosphere is.

• Non of the above.

A water sample with a pH of 7 is considered:

• basic

• acidic

• neutral

• turbid

pH greater than 7 is considered to be

• neutral.

• basic.

• acidic.

• polluted.

Why are too many nutrients (like nitrates and phosphates) bad for our waters?

• Nutrients decrease the pH of the water, causing it to become increasingly acidic

• Nutrients change the salinity of the water

• Wetlands filter out runoff that may contain nutrients

• Nutrients in the water cause too much algae growth, which decrease the level of oxygen in the water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3