Review

What is the movement of cold, nutrient-rich waters from the bottom of the ocean, promoting algae growth?

• upwelling

• deposition

• precipitation

• eutrophication

The EPA (Environmental Protection Agency) regulates the level of turbidity in drinking water to protect public health. The EPA sets the limit at 0.3 NTU (Nephelometric Turbidity Units). The data shows the turbidity level of four samples taken from the same location over four consecutive days. Based on the data, which best explains the quality of the drinking water?

• The drinking water is safe because the first two samples are below the recommended limit

• The drinking water is unsafe because the last two samples are above the recommended limit

• The drinking water is unsafe because the last two samples are below the recommended limit

• The drinking water is safe because the average of the samples is below the recommended limit

Where is most of the freshwater found on Earth?

• atmosphere

• groundwater

• polar ice caps

• rivers and streams

Tags

NGSS.MS-ESS2-4

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

Which percentage represents the amount of Earth’s water that is found in oceans?

• 3%

• 7%

• 97%

Tags

NGSS.MS-ESS2-4

Which does an increase in eutrophication indicate to scientists studying a body of water?

• an increase in fertilizer runoff

• a decrease in pollutants from farm runoff

• an increase in the health of the body of water

• an increase in oxygen levels in the body of water

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Which is one way people can help prevent the pollution of lakes and rivers?

• by controlling soil erosion around lakes and rivers

• by clearing land around lakes and rivers to build homes

• by limiting the amount of fish caught in lakes and rivers

• by creating hiking and biking trails along lakes and rivers

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NGSS.MS-LS2-5

Which is the most important reason for maintaining clean water?

• Energy cannot be generated without water

• Organisms cannot live and grow without water

• Goods cannot be transported easily without water

• People cannot maintain proper hygiene without water

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which is the most important reason why findings of water quality studies need to be communicated to policy makers?

• so laws can be enacted to protect the hydrosphere

• so policy makers will begin to conserve water personally

• so laws protecting the environment can have fewer penalties

Tags

NGSS.HS-LS2-7

Which is an action people can take to protect the water supply?

• Turn off faucets while brushing teeth

• Continue to run water while washing dishes

• Pour cooking oil down kitchen drains after cooking

• Water outside plants during the middle of the day