E.1.4 Test

In the United States, which is responsible for ensuring the safety of the country’s drinking water

• EPA

• FDA

• NOAA

How could government laws have themost direct impact on water quality?

• provide rewards to recycle

• provide rewards to use solar power

• provide rewards to use liquid-absorbing surfaces

What water quality standard pertains to bacteria levels?

• dissolved oxygen levels

• fecal coliform levels

• nitrate levels

Which most likely would cause diseases to be spread by polluted water?

• dumping human waste in rivers and streams

• runoff that contains fertilizers and pesticides

• an oil spill resulting from an accident to a ship carrying oil as cargo

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

Which are two factors that affect water quality?

• density and toxicity

• texture and color

• odor and acidity

Tags

NGSS.MS-LS2-4

How does the use of fluoride in drinking water affect the human population?

• It helps to prevent tooth decay.

• It kills bacteria in the water.

• It regulates pH of the water.

Which disease that once caused many deaths has been limited due to the implementation of water quality standards?

• Influenza

• Cholera

• Smallpox

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-ESS2-5

NGSS.HS-LS2-7

Why is arsenic contamination difficult to monitor?

• It shows few symptoms.

• It is present everywhere.

• It is odorless and tasteless.

What is the main source for arsenic contamination of drinking water?

• uncapped mines

• building materials

• farms and industry