1) The first stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser. 2) The second stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser. 3) The third stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser. 4) The fourth stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser. 5) The fifth stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser. 6) The last stage of Eutrophication a) Bacteria feed on the dead algae. b) The algae grow quickly. c) As the numbers of bacteria grow, they use up all the oxygen in the water. The fish die. d) Fertilisers containing phosphates and nitrates are washed into the lake by rain e) The algae become overcrowded and cannot get enough light for photosynthesis, so they die. f) The algae in the lake use the phosphates and nitrates in the fertiliser.

CAX KS4 Eutrophication mix and match

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