Eutrophication: 20 Questions

What is the relationship between population growth and agriculture?

• As the population grows, agriculture tends to increase to meet the food demands of the larger population.

• Population growth leads to a decrease in agricultural productivity due to overuse of land.

• Agriculture has no significant impact on population growth rates.

• Population growth results in a shift from agriculture to industrial production.

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What is eutrophication?

• A process where water bodies become overly enriched with nutrients, leading to excessive growth of algae and depletion of oxygen.

• A method of purifying water by removing pollutants and contaminants.

• A phenomenon where water bodies freeze over during winter months.

• A technique used in agriculture to enhance soil fertility through crop rotation.

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What causes eutrophication?

• Runoff from fertilizers, sewage, and detergents that contain high levels of nutrients like nitrogen and phosphorus.

• Excessive rainfall leading to flooding in aquatic systems.

• Increased water temperature due to climate change.

• Overfishing in lakes and rivers.

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What are some visible signs of eutrophication in a lake?

• Clear blue water

• Floating mats of algae

• High levels of dissolved oxygen

• Presence of large fish

What is the impact of eutrophication on water quality?

• Eutrophication improves water quality by increasing oxygen levels.

• Eutrophication negatively impacts water quality by causing algal blooms, which can produce toxins and reduce clarity.

• Eutrophication has no effect on water quality.

• Eutrophication enhances the growth of beneficial aquatic plants.

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What is an algal bloom?

• A rapid increase in the population of algae in water bodies, often resulting from eutrophication.

• A decrease in water temperature leading to algae death.

• A type of fish that thrives in polluted waters.

• A method of water purification using algae.

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What is the significance of dissolved oxygen in aquatic ecosystems?

• It is essential for the survival of fish and other aquatic organisms, as they rely on it for respiration.

• It helps in the growth of aquatic plants by providing nutrients.

• It regulates the temperature of the water, making it suitable for aquatic life.

• It acts as a barrier to prevent pollutants from entering the water.

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How can eutrophication be prevented?

• By increasing the use of fertilizers in agriculture.

• By reducing nutrient runoff through better agricultural practices, wastewater treatment, and controlling stormwater.

• By allowing more stormwater to flow into water bodies.

• By promoting the use of pesticides in farming.

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How does eutrophication affect oxygen levels in water?

• Eutrophication leads to increased oxygen levels as algae produce more oxygen.

• Eutrophication has no effect on oxygen levels in water.

• Eutrophication leads to decreased oxygen levels as decomposers break down dead algae, consuming oxygen in the process.

• Eutrophication causes oxygen levels to fluctuate dramatically without a clear trend.

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What is the term for the process of oxygen depletion in water?

• Hypoxia

• Eutrophication

• Anoxia

• Oligotrophy

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