8.e.1 Water quality/pollution

We used bioindicators to measure the quality of water.  What is a bioindicator?

• any living creature
• eutrophication
• An organism sensitive to its environment
• a turbidity tube

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

how does increasing nitrates impact stream health

• excess algae
• increased oxygen
• increased water clarity

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

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Factors that affect dissolved oxygen include

• temperature and stream flow.

• lack of fish and amphibians.

• the amount of carbon dioxide.

• Non of the above.

pH greater than 7 is considered to be

• neutral.

• basic.

• acidic.

• polluted.

What is the healthy pH level for potable water?

• 2

• 7

• 14

• 5