IB ESS HL 4.4 Water pollution Question Bank
4.4 Water pollution
- 4.4.1—Water pollution sources
- 4.4.2—Plastic debris accumulation
- 4.4.3—Water quality measurement
- 4.4.4—Biochemical oxygen demand (BOD)
- 4.4.5—Eutrophication
- 4.4.6—Eutrophication sequence
- 4.4.7—Eutrophication and ecosystem services
- 4.4.8—Eutrophication management levels
- 4.4.9 (HL)—Water pollutants
- 4.4.10 (HL)—Harmful algal blooms
- 4.4.11 (HL)—Anoxic and hypoxic waters
- 4.4.12 (HL)—Sewage treatment stages
- 4.4.13 (HL)—Indicator species
- 4.4.14 (HL)—Biotic index
- 4.4.15 (HL)—Water Quality Index (WQI)
- 4.4.16 (HL)—Water quality guidelines
- 4.4.17 (HL)—Citizen action
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