Water Pollution

Eutrophication is

• too few nutrients in a body of water.

• too many nutrients in a body of water.

• high acid levels in a body of water.

• high alkalinity levels in a body of water.

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Eutrophication is caused by...

• fossil fuel burning in power plants.

• automobiles burning fossil fuels.

• over fertilizing farm fields.

• limestone rocks in a body of water.

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Chemicals that contribute to eutrophication include... (pick all that apply)

• dissolved Oxygen.

• phosphates.

• nitrates.

• sulfuric acid.

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NGSS.MS-LS2-3

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Nutrients cause what effect in our creeks and rivers?

• limestone to disappear.

• dissolved Oxygen levels to rise.

• algae to grow more rapidly.

• bacteria populations to decrease.

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When nutrient levels rise to high levels in a body of water, the effect on dissolved Oxygen levels is...

• decreases.

• increases.

• does not change.

When algae levels increase in a body of water, it

• cuts off light to plants at the bottom.

• increases light to the plants on the bottom.

• causes dissolved Oxygen levels increase.

• causes bacteria populations decrease.

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NGSS.MS-LS2-1

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Which is the correct order of changes that occur during eutrophication?

• Aquatic plants cannot photosynthesize and die. Algal blooms blocks light from entering lower levels of a pond or lake. The fish and other aquatic organisms die. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The algae die.

• Algal blooms blocks light from entering lower levels of a pond or lake. Aquatic plants cannot photosynthesize and die. The algae die. The fish and other aquatic organisms die. The bacteria decompose the algae, and they use up a lot of oxygen during this process.

• Algal blooms blocks light from entering lower levels of a pond or lake. Aquatic plants cannot photosynthesize and die. The algae die. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The fish and other aquatic organisms die.

• Aquatic plants cannot photosynthesize and die. Algal blooms blocks light from entering lower levels of a pond or lake. The bacteria decompose the algae, and they use up a lot of oxygen during this process. The algae die. The fish and other aquatic organisms die.

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NGSS.MS-LS2-3

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In eutrophication, dissolved oxygen levels decrease because

• decomposers use it in cellular respiration

• algae bloom and use it up

• plant nutrients react with the dissolved oxygen

• fish use it up

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NGSS.MS-LS2-3

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Which organisms are most affected by bioaccumuation?

• Top predators

• Producers

• Primary Consumers

• Herbivores

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NGSS.MS-LS2-3

What is bioaccumulation

• lack of oxygen caused by excessive nutrients in the water

• an excess of pests

• the build up of toxins in a food chain

• an accumulation of biomes

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NGSS.MS-LS2-3