Water Use and Pollution

One of the reasons it is important to keep our water supplies pollution-free is potability. Water that is potable is

• fit to drink.

• oxygenated.

• polluted.

• unfit to drink.

When it comes to conserving water, small adjustments can have a big impact. Which uses less water?

• five minute bath

• five minute shower

• washing the car

• watering the lawn

How does heat act as a water pollutant?

• It decreases the oxygen in the water.

• It increases the nutrients in the water.

• It slows down the flow of water.

• It speeds up chemical reactions.

Tags

NGSS.MS-PS3-4

Which of the following is an example of nonpoint-source pollution?

• chemical factory

• farmland runoff

• oil spill

• wastewater treatment plant

Tags

NGSS.MS-ESS3-3

Which of the following is NOT an example of point-source pollution?

• heavy metals that are leaching out of an underground mine

• oil that is escaping from a damaged tanker

• untreated sewage that is accidentally released from a wastewater treatment plant

• water runoff from residential lawns

Conserve means to save. We all want to save our natural resources. Elisa is trying to help her parents conserve water at home. What is one way Elisa can conserve water at home?

• fix a leaky faucet

• play under the lawn sprinklers

• run water while brushing teeth

• washing her hands before eating

Tags

NGSS.MS-ESS2-4

Some negative effects of human activities on the environment can be counteracted by increasing the

• enforcement of pollution control laws.

• growth of the human population.

• use of nonbiodegradable materials.

• use of pesticides.

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

Which of the following pollutants causes artificial eutrophication?

• heavy metals from unlined landfills

• inorganic plant nutrients from wastewater and fertilizer runoff

• radioactive waste from nuclear power plants

• toxic chemicals from factories

Sewage treatment is the process of removing contaminants from wastewater and household sewage. It includes physical, chemical, and biological processes to remove physical, chemical, and biological contaminants. Identify the positive effects of sewage treatment on the environment.

• to preserve the natural environment by controlling water pollution

• to preserve the natural environment by controlling water pollution and protect the public health from the spread of diseases

• to protect the public health from the spread of diseases

• to provide jobs in America

Tags

NGSS.MS-ESS3-3

DDT accumulates in the fatty tissues of animals and is transferred along food chains. Its concentration increases along each link of a food chain. This is known as biomagnification. Which of the following organisms would accumulate the HIGHEST concentration of DDT in a given food chain?

• corn (producer)

• field mouse (primary consumer)

• owl (predator)

• rabbit (herbivore)

Tags

NGSS.MS-LS2-4