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Effect of acid rain on algae Featured science projectScience project video


It is observed that red algae is able to survive in the acidic water and is hence acidophilic. Green algae is able to tolerate a small amount of acidity in the water but spirogyra cannot survive in acidic waters at all.

Water pH Effect of acid rain on algae
  Spirogyra Green Algae Red Algae
7 Y Y Y
6 X Y Y
5 X X Y

Y - algae is still alive, X - algae is dead

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 4 days for observation
Material availability:
Easily found
Safety concerns:

Basic safety requirements, Use gloves and safety goggles/masks when handling the sulphuric acid.