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How does the acidity of lake water affect the hardness of Zebra mussel shells? Featured science projectScience project video


It is observed that the Zebra mussels from the lake with pH 6.5 had softer shells and the mussels from the lake with pH 7.5 had the hardest shells.

pH of lake water 6.5 (acidic) 7.0 (neutral) 7.5 (alkaline)
Hardness of shell (kg) 6.85 9.8 10.95

The graph below represents the results of our science project experiment:

zebra mussels science fair project

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 1 day for observation
Material availability:
You will need access to a hardness tester. You will also require transportation to travel to the lakes to gather mussel samples
Safety concerns:

Basic safety requirements