What was the scientists’ hypothesis concerning lake eutrophication in Experiment 1?
F. Run-off from farmland increases levels of phosphates and nitrates, speeding up the eutrophication process.
G. Fertilizer used on the golf course increases phosphate and nitrate levels in lake water.
H. Pesticides and animal waste entering the lake through a feeder stream hinder the eutrophication process.
J. Increases in phosphate and nitrate concentration lead to more plant and algae growth, increasing chlorophyll levels in the lake.

Experiment 1
Scientists suspected that one source of nutrients was a feeder stream which intercepts run-off from farmland where pesticides and animal waste are found. Water samples were
obtained over several days from that stream (Feeder A) as well as another feeder stream (Feeder B) not near the farm. Results are displayed in Table 1.

Transcribed Image Text:

Day Day 1 Day 2 Day 3 Day 4 Day 1 Day 2 Day 3 Day 4 Phosphate concentration (mg/L) 20.7 13.2 35.6 42.3 Table 1. 10.4 11.5 7.9 10.2 Feeder A Feeder B Nitrate concentration (mg/L) 43.2 44.5 41.6 58.0 13.2 13.4 12.9 11.4