Human Impact on the Environment (Grade 11 NSC Matric Life Sciences): Flashcards
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Practise the cards
10 cards from this deck
Water quality definition
Water quality definition
How clean & safe water is for drinking & supporting aquatic life
Eutrophication
Eutrophication
Excess nutrients in water causing rapid algae growth
Algal bloom
Algal bloom
Thick green algae layer covering water surface
Effect of algal blooms on oxygen levels
Effect of algal blooms on oxygen levels
Bacteria decompose dead algae using up oxygen, killing fish
Agricultural contamination sources
Agricultural contamination sources
Fertilisers, pesticides, herbicides washing into water systems
Industrial effluent
Industrial effluent
Liquid waste from industries containing dangerous chemicals
Acid mine drainage (AMD)
Acid mine drainage (AMD)
Sulfuric acid formed when groundwater contacts sulphide minerals
Thermal pollution
Thermal pollution
Heated water discharge from industries into natural water bodies
Greatest threat to SA water systems
Greatest threat to SA water systems
Water hyacinth - invasive plant blocking sunlight & clogging pipes
Water recycling
Water recycling
Treating & reusing water that has already been used