Water Quality

Which factors can 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

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which will most likely happen to a biological indicator species if there is a sudden increase in pollution?

• There will be a significant increase in the population numbers and the quality of the individuals.

• There will be a significant decrease in the population numbers and the quality of the individuals.

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

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

Tags

NGSS.MS-LS2-4

How might fertilizer runoff from a soybean field affect the quality of water in the farm pond?

• It increases the pH level.

• It decreases the overall water temperature.

• It promotes algae growth, which lowers the oxygen level in the pond.

• It decreases the turbidity, which lowers the amount of particles in the pond.

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-3

After analyzing data collected from a pond, there is a significant decrease in dissolved oxygen. Which most likely caused the decline?

• an increase in minerals

• an increase in sediment

• an increase in algae growth

• an decrease in fish population

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What most directly affects the amount of dissolved oxygen in a body of water?

• pH

• salinity

• temperature

• turbidity

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which most likely has the highest number of contaminants in the water?

• a water system with moderate turbidity

• a water system with high turbidity

• a water system with low turbidity

• a water system with no turbidity

A measure of the natural populations of algae, plants, fish, and other wildlife provides evidence of the health of a body of water. By which term are these measures known?

• pH indicators

• bio-indicators

• abiotic factors

• turbidity factors

Which is most likely to happen when river water temperature rises above 35°C?

• The water will become polluted.

• The dissolved oxygen levels will increase.

• There will be negative health effects on wildlife.

• There will be decreased evaporation from the river.

Tags

NGSS.MS-LS2-4

Which best describes the relationship between temperature and dissolved oxygen in a lake?

• As temperature increases, dissolved oxygen increases.

• As temperature increases, dissolved oxygen decreases.

• As temperature decreases, dissolved oxygen decreases.

• A change in temperature has no effect on dissolved oxygen.

Tags

NGSS.MS-LS2-4

Which best determines the health of a lake used as a source of freshwater?

• its depth and width

• its temperature and pH

• its location and depth

• its temperature and depth

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3