Eutrophication Quiz

What is eutrophication?

• A process where excess nutrients in water cause dense algae growth and death of aquatic organisms due to lack of oxygen.

• A method of water purification.

• A type of agricultural practice.

• A form of air pollution.

Which of the following is a cause of eutrophication?

• Excess nutrients from fertilizers, sewage, and manure.

• Lack of sunlight.

• Overfishing.

• High levels of carbon dioxide.

What is one effect of eutrophication on aquatic environments?

• Increase in dissolved oxygen.

• Decrease in dissolved oxygen.

• Increase in water clarity.

• Growth of coral reefs.

Oysters played a role in the Chesapeake Bay before their population was depleted by (a)  

• They increased the water temperatur
• They filtered excess nutrients out
• They caused eutrophication.
• They decreased the water's pH level

How can eutrophication be prevented in water bodies?

• By adding more nutrients to the water.

• By increasing fish population.

• By reducing nutrient runoff through better agricultural practices.

• By increasing the use of chemical fertilizers.

Which organism is most likely to thrive in a eutrophic environment?

• Coral reefs.

• Algae.

• Large fish species.

• Sea turtles.

What is a common indicator of eutrophication in a lake?

• Clear water with high visibility.

• Abundant aquatic plant life.

• High levels of dissolved oxygen.

• Thick layers of algae on the surface.

What human activity is most responsible for contributing to eutrophication?

• Urban development.

• Agricultural runoff.

• Industrial emissions.

• Deforestation.

Which of the following is a potential consequence of eutrophication in marine environments?

• Improved water quality.

• Enhanced coral growth.

• Increased biodiversity.

• Formation of dead zones.

How does eutrophication affect fish populations in affected water bodies?

• Decreases fish population due to oxygen depletion.

• Increases fish population due to more food availability.

• Increases fish population due to cleaner water.

• No effect on fish population.