Water Quality

If you want to determine the health of a lake that is used as a source of freshwater, which properties should you look at?

• The lake's depth and width.

• The lake's temperature and pH.

• The lake's location and depth.

• The lake's temperature and depth.

Tags

NGSS.MS-ESS2-4

What is the relationship of the number of individuals in a biological indicator species population to the health of the water system?

• The health of the water system is declining if the number of individuals shows a steady decline.

• The pollution in the water system is increasing if the number of individuals shows a steady increase.

• The population becomes a better biological indicator species if the number of individuals increases.

• The population becomes a better biological indicator species if the number of individuals decreases.

Tags

NGSS.MS-LS2-4

When the water temperature changes, which property is most likely to be affected?

• nitrates

• turbidity

• bioindicators

• dissolved oxygen

Tags

NGSS.MS-LS1-5

A recent algal bloom occurred in a pond nearby. Which is the best tool to use to find out if this event has made the water too basic for aquatic organisms?

• a dissolved-oxygen meter

• a thermometer

• a turbidity tube

• a pH meter

Which statement shows the correct comparison of an oxygen-rich freshwater environment and one that is oxygen-poor?

• Oxygen-poor water is clear, while oxygen-rich water is murky.

• Oxygen-poor water has fish and plants, while oxygen-rich water does not.

• Oxygen-poor water contains excess decaying organic matter, while oxygen-rich water does not.

• Oxygen-poor water is found in mountain streams, while oxygen-rich water is found at the mouth of a river.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Which of the following factors has the greatest effect on the level of dissolved oxygen in a water system?

• amount of rainfall

• variety of bioindicators

• runoff from a lawn treated with fertilizers

• decreased amount of fish due to overfishing

Tags

NGSS.MS-ESS3-4

The graph shows pH data for a local river throughout 2009.

In which month would the pH level most likely cause fish to die?

• March

• April

• July

• December

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following scenarios contribute most to an increase in turbidity of a local water system?

• people canoeing or kayaking on the water

• people swimming and jumping into the water

• paved roads and driveways that are adjacent to the water

• community parks and baseball fields that are adjacent to the water

Tags

NGSS.MS-ESS3-3

Which of the following best explains the statement below?

Temperature influences the biological activity of a lake.

• The rate of chemical reactions stabilizes at higher temperatures.

• The rate of chemical reactions decreases at higher temperatures.

• Cold water may be saturated with oxygen but unable to support aquatic life.

• Warm water may be saturated with oxygen but unable to support aquatic life.

Tags

NGSS.MS-LS2-4

What is the most likely range of the pH of a lake that is affected by acid rain?

• 1 to 2

• 3 to 6

• 7 to 9

• 10 to 12

Tags

NGSS.MS-ESS3-4

NGSS.MS-PS1-2