Eutrophication
Chemistry ⇒ Environmental Chemistry
Eutrophication starts at 11 and continues till grade 12.
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See sample questions for grade 11
Describe how wetland restoration can help prevent eutrophication.
Describe the difference between point source and non-point source pollution in the context of eutrophication.
Describe the role of cyanobacteria in eutrophication.
Describe the sequence of events that leads from nutrient enrichment to fish kills in eutrophic water bodies.
Describe two negative impacts of eutrophication on aquatic ecosystems.
Explain how agricultural runoff contributes to eutrophication.
Explain how eutrophication can affect human health.
Explain the term 'oligotrophic' in relation to water bodies.
Explain why algal blooms can be harmful even if they are not toxic.
Explain why fish kills are common in water bodies affected by eutrophication.
Explain why reducing phosphorus input is often more effective than reducing nitrogen input in controlling freshwater eutrophication.
List two sources of nutrient pollution that can cause eutrophication.
Name one method used to control or prevent eutrophication in lakes.
A lake receives runoff containing high levels of nitrates and phosphates from nearby agricultural fields. After several months, the lake experiences a massive algal bloom followed by a sharp decline in fish population. Explain the sequence of chemical and biological events that led to the decline in fish population.
A river system passes through an urban area and receives untreated sewage, leading to eutrophication downstream. Suggest two chemical indicators you would monitor to assess the extent of eutrophication and justify your choices.
Describe how the Redfield ratio is relevant to understanding nutrient limitation and eutrophication in aquatic ecosystems.
Discuss the potential impact of climate change on the frequency and severity of eutrophication events in aquatic ecosystems.
Explain the chemical changes that occur in a water body during the process of eutrophication, focusing on the nitrogen and phosphorus cycles.
