1. What event in 1969 raised public awareness about water pollution?

• The burning of the Cuyahoga River

• The introduction of the Clean Water Act

• A major oil spill

• The discovery of lead in drinking water

Which type of pollution comes from a specific source, like a pipe?

• Non-point source pollution

• Groundwater pollution

• Point source pollution

• Surface runoff

The biochemical oxygen demand (BOD) is a measure of what?

• The amount of waste in water

• The level of nutrients in water

• The total dissolved solids in water

• The temperature of the water

What is the big thing that the wastewater consumes when it is being broken down in a river?

• Nitrogen

• Oxygen

• Kinetic energy

• Sugars

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NGSS.MS-LS2-3

What is the algal bloom that occurs with an increase in nutrients in a system called?

• Dead Zones

• Disease

• BOD

• Eutrophication

What happens to oxygen levels in water when decomposing bacteria break down waste?

• They increase significantly

• They remain constant

• They decrease

• They fluctuate wildly

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NGSS.MS-LS2-3

What environmental issue is caused by excess nutrients in water?

• Reduced water temperature

• Algal blooms

• Increased oxygen levels

• Decreased sedimentation

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NGSS.MS-LS2-1

What is a primary consequence of wastewater pollution?

• Increased fish populations

• Creation of dead zones

• Improved water quality

• Decreased nutrient levels

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NGSS.MS-LS2-1

What is a significant health risk associated with polluted water?

• Increased fish populations

• Outbreaks of diseases like cholera

• Decreased agricultural productivity

• Improved water filtration

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NGSS.MS-LS2-1

Which of the following is NOT a chemical pollutant mentioned in the video?

• Lead

• Pesticides

• Algae

• Mercury