Hydrosphere Part 2-Freshwater & Water Quality

If there is a sudden increase in pollution what would most likely happen to a biological indicator species?

• There will be an increase in the population and quality of species.

• There will be a decrease in the population and quality of species.

• The biological indicator species will reproduce at lower rates, which will maintain population numbers.

A recreational lake experiences eutrophication because of excess nutrients. Based on this information, how would it most likely appear?

• orange and rust-colored

• murky and full of algae

• oily and greasy

• clear and blue

Which ocean water temperature change is most dangeous for aquatic life?

• 5 degrees C to 10 degree C

• 15 degrees C to 20 degree C

• 25 degree C to 20 degree .C

• 35 degrees C or higher

If a lake is located in an area with significant amounts of air pollution, which health measure would be most directly affected?

• nitrates

• turbidity

• pH

• dissolved oxygen

Why does a cloudy lake produce less plant life than a clear lake?

• A cloudy lake prevents photosynthesis from occurring, while a clear lake allows photosynthesis to occur in plants.

• A cloudy lake has few dissolved nutrients, while a clear lake has many.

• A cloudy lake absorbs little heat, while a clear lake absorbs much heat.

Which is the greatest impact of large quantities of sediment flowing into North Carolina's rivers and streams?

• Sediment poisons fish.

• Sediment increases the depth of rivers & streams, reducing the amount of flowing water.

• Sediment increases the temperature of the rivers and streams.

• Sediment interferes with the ability for fish to find mates.

Ammonia is a basic chemical found in animal wastes. Which of the following could be the pH of a river near a farm after a rainstorm?

• 0

• 7

• 2

• 9

Which aspect of water quality is most affected by changes in temperature?

• turbidity

• bioindicators

• invasive species

• dissolved oxygen

Which factors have the greatest effect on the health of a river system?

• type of soil and salinity

• nitrate levels and turbidity

• human consumption and pH

• natural disasters and tidal changes

Rainbow trout are found in mountain streams and are sensitive to changes in their habitat. Which would be the best description for the use of rainbow trout in water quality testing?

• invasive species

• bioindicator