You are a scientist studying the organisms and water conditions in a local lake.

Question

You are a scientist studying the organisms and water conditions in a local lake. Over several years you notice that both the number of a certain type of fish in the lake has decreased and the acidity of the lake water has increased. You are curious, so you plan to conduct an experiment to learn more. 24. Name one observation you have made? For extra credit name up to 2 more. 25. State a hypothesis based on your observations. 26. State a prediction you will use to test your hypothesis 27. Describe one step you will use to conduct your experiment. Extra credit to describe 2 additional steps.

Explanation / Answer

24: Acid rain could increase the acidity of the water and affected the certain sensitive fish species of the lake.
25: Acid rain reduces the pH of the lack water and causes death of fishes sensitive to the acidic pH.
26: Acidic water changes the blood chemistry of the fishes due to clogging of gills by aluminium which leaches from soil into the acidic water.
27: Check the presence of aluminium in the gills of the fishes or to observe their reproductive cycle as acidic water also disturb their reproductive cycle.

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