Water Quality Quiz Review

Ja'ron lives near a river that flows through farmland. He notices that the river has become more polluted over the years. The water that was once clear is now sometimes turbid and has an unpleasant odor. What is the most likely cause of the pollution in the river?

• heat

• oil and gasoline

• industrial waste

• pesticides and fertilizer

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Henderson Island, once unaffected by humans, is located in an area where ocean pollution collects. It is estimated that the beaches of this small island are now covered with 38 million pieces of trash. Which statement best explains one likely way all this trash affects animals on or near the island?

• In the trash, there is food that the animals can eat

• Animals have difficulty crossing the beaches to get to the water

• Animals can get tangled up in the trash and be unable to swim or otherwise move

• When animals die from eating trash, they provide a good food supply for other animals

Tags

NGSS.MS-LS2-4

Roberto plans on becoming a marine biologist, and he is quite concerned about cleaning up current water pollution and preventing future pollution. Which of these ways probably will be effective in reducing water pollution? Choose the three statements that apply.

• Clean up and prevent oil spills

• Enact laws that control possible pollutants

• Have factories dump wastes on the land instead of into the water

• Encourage farmers to leave plants in the field after harvest to prevent chemical runoff

Examine the diagram. Which sources of pollution are point sources?

• factories, cropland

• wastewater treatment plants, factories

• urban streets, suburban development

• urban streets, suburban developments, rural homes, cropland, animal feedlot

Research was conducted over a 14-day period to determine the differences in water quality for a river and a nearby pond. Five factors were monitored, and the data for two of the factors were plotted in graphs. What can be summarized from the data?

• The pond had overall lower temperatures than the river which contributed to lower dissolved oxygen levels in the pond.

• The pond had overall higher temperatures than the river which contributed to lower dissolved oxygen levels in the pond.

• The pond had overall lower temperatures than the river which contributed to higher dissolved oxygen levels in the pond.

• The pond had overall higher temperatures than the river which contributed to higher dissolved oxygen levels in the pond.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The graph shows the changes in dissolved oxygen content of a lake for a duration of 24 hours. An adult brown trout is more active when the dissolved oxygen content is between 9 and 12 mg/L. What time of the day is best for catching a brown trout?

• 2:00 a.m.

• 6:00 a.m.

• 2:00 p.m.

• 6:00 p.m.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The table summarizes how pH affects various fish species. If a lake with a pH of 6 becomes more acidic over time, what is the most likely effect on the lake’s fish species?

• The pH of the water will decrease, making the conditions more unsafe for fish over time.

• The pH of the water will increase, causing slower growth in fish over time.

• The pH of the water will decrease, causing faster growth in fish over time.

• The pH of the water will increase, making the conditions lethal for fish over time.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

According to a research study of a local lake, phosphorus contamination caused an excessive growth of algae. When the algae died, microorganisms decomposed the algae and consumed a large amount of the dissolved oxygen in the lake. How will the fish species in the lake most likely be affected by these events?

• The fish will breathe normally.

• The fish will become more active.

• The fish populations will decrease.

• The fish populations will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A local river is found to be contaminated with an excess of nitrates. A student lists four possible methods to prevent nitrate contamination in the river. Which method(s) is (are) most effective in controlling the nitrate contamination in water?

• 1 only

• 4 only

• 1 and 2

• 2 and 3

Tags

NGSS.MS-ETS1-3

NGSS.MS-LS2-4

A researcher collects water samples from four different surface water sources. He measures the turbidity levels of the samples in Nephelometric Turbidity Units (NTU) and records them in a table. Which sample would likely contain the least dissolved oxygen?

• Sample 1

• Sample 2

• Sample 3

• Sample 4