Water Quality Quiz

Priya and William are conducting a science experiment in their school. They are testing the water quality of a local pond. They need to measure the dissolved oxygen level in the water. Can you tell them in what unit they should measure it?

• kg/L

• ppm

• mg/L

• g/L

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NGSS.MS-LS2-1

Arjun, Nora, and Michael are studying the impact of dissolved oxygen on aquatic life in their science project. According to their research, what is the impact of dissolved oxygen on aquatic life?

• They found that more dissolved oxygen is generally worse for aquatic life

• They concluded that dissolved oxygen has no impact on aquatic life

• They discovered that aquatic animals need CO2 to breathe

• They learned that aquatic animals need O2 to breathe

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NGSS.MS-LS2-4

Nora, Aria, and Anika are conducting a science experiment in their school. They collected some rainwater for their experiment. What would be the pH level of the rainwater they collected?

• pH 7

• pH 4-6

• pH 5.6

• pH 6.5-8

Ethan, William, and Zoe are studying the effects of different factors on the acidity of water in their science project. They are trying to understand what could cause the water in their local lake to become too acidic. What could be a possible cause?

• Alkaline geology in the area

• Acid rain falling into the lake

• Use of cleaning substances in nearby homes

• Disposal of basic industrial waste into the lake

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NGSS.MS-LS2-4

Nora, Olivia, and Daniel are conducting a science experiment to understand the factors affecting the dissolved oxygen level in a water sample they collected from a nearby pond. According to their observations, what could potentially affect the dissolved oxygen level in the water sample?

• Waste runoff from nearby industries

• Changing weather conditions

• All of the above

• Turbidity caused by stirring the water sample

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NGSS.MS-ESS3-4

Arjun and Nora are working on a science project about water pollution. They are studying the substances that contribute to water pollution. In their research, they found that two substances, nitrogen and phosphorous, are commonly found in certain materials. Can you help Anika guess which materials these might be?

• Sewage and plankton

• Fertilizer and detergents

• Plants and animals

• Industrial waste

During a science experiment, Luna, David, and Ethan observed a pond with high turbidity. What effect would this higher turbidity have on the pond's water temperature?

• Turbidity has no effect on water temperature

• Lower turbidity makes water cooler

• Higher turbidity makes water hotter

• Higher turbidity makes water cooler

Ethan, Aria, and Kai are studying the effects of pollution on a local pond. They are using certain organisms as bioindicators. What information can these bioindicators provide them?

• Potential harm to humans & wildlife

• Health of the pond system

• All of the above

• Tolerance of organisms to pollution