Which of the following is NOT used as a tertiary treatment to sanitize wastewater?

• Chlorine
• Ozone
• UV light
• CFC

Tags

NGSS.MS-ETS1-1

The release of a large amount of sewage overflow into a nearby creek would lead to:

• High DO, High BOD, Low Fecal Coliform
• Low DO, High BOD, Low Fecal Coliform
• Low DO, High BOD, High Fecal Coliform
• Low DO, Low BOD, High Fecal Coliform

Tags

NGSS.MS-LS1-5

Presence of fecal coliform bacteria suggests that

• a factory polluted the river

• a nearby treatment plant added chlorine to the waste water

• the water is safe for drinking

• untreated animal waste contaminated the water

Tags

NGSS.MS-LS2-4

The process of human activities in urban or agricultural areas that load nutrients into surface bodies of water is known as

• artificial fertilization

• cultural eutrophication

• thermal pollution

• lake stratification

• synthetic primary productivity

Which of the following is a point-source pollutant?

• Sediment loading from erosion

• Runoff of pesticides from croplands

• Animal wastes from feedlots

• Fertilizer runoff from urban areas

• A sewage treatment plant effluent pipe

What is the danger in eating large fish like tuna and shark?

• They may be invasive species.

• If abundant, they may lead to a crash in other species.

• If they are high on the food chain they may contain high levels of mercury or POP's like PCB's

• They may contain too many nutrients from fertilizers.

Tags

NGSS.MS-LS2-5

Which of the following describes a component of a modern sanitary landfill?

• a series of screens and grates to prevent large objects from entering the landfill

• a bottom liner of plastic or clay to prevent groundwater contamination

• aerated tanks in which bacteria break down organic matter

• chemical or ultraviolet light systems that kill pathogens 

Oil and fertilizer was dumped into a local waterway after being improperly disposed of. This is an explanation of which type of pollution?

• nutrient

• toxic

• sediment

• bacteria

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

How would thermal pollution impact mangrove forests?

• The dissolved oxygen levels would increase, resulting in greater biodiversity.

• The dissolved oxygen levels would decrease, resulting in lowered species success.

• The dissolved oxygen levels would increase, resulting in greater photosynthesis by mangrove roots.

• The dissolved oxygen levels would remain the same, since mangroves perform both photosynthesis and cellular respiration.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following best describes why DDT is considered a persistent organic pollutant?

• DDT is able to be used repeatedly with the same level of effectiveness.

• DDT is able to affect only target species while leaving non-target species unaffected.

• DDT remains in the environment for years after its use.

• DDT has a low impact on aquatic ecosystems.