Eutrophication

Disposal of sewage in water causes...

• death of marine animals

• growth of sea weeds

• death of algae

• All of the above

What is eutrophication?

• A process of nutrient enrichment in water bodies

• A method of water purification

• A type of soil erosion

• A form of air pollution

Which of the following is a primary cause of eutrophication?

• Excessive use of fertilizers

• Deforestation

• Industrial air pollution

• Overfishing

What is a common consequence of eutrophication in aquatic environments?

• Algal blooms

• Increased fish population

• Clearer water

• Decreased water temperature

How does eutrophication affect fish populations?

• Decreases oxygen levels, harming fish

• Increases food supply for fish

• Improves fish health

• Has no effect on fish

Which human activity is most associated with causing eutrophication?

• Agricultural runoff

• Urban development

• Mining

• Fishing

What role do phosphates play in eutrophication?

• They act as nutrients that promote algal growth

• They help in water purification

• They reduce water acidity

• They are harmless to aquatic life

Which of the following is a method to control eutrophication?

• Reducing nutrient runoff

• Increasing fish farming

• Building more dams

• Using more fertilizers

What is the impact of eutrophication on recreational water activities?

• Decreases water quality, affecting activities

• Improves water clarity for better swimming

• Has no impact on water activities

• Increases opportunities for fishing

How does eutrophication affect biodiversity in aquatic ecosystems?

• Reduces biodiversity by creating dead zones

• Increases biodiversity by providing more nutrients

• Has no effect on biodiversity

• Promotes the growth of diverse plant species