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Aquatic plants and animals and the acidification of our oceansFeatured science projectScience project video

Observation

The results show that the acidity in the water will increase if there are only fishes and no aquatic plant. Increasing the number of aquatic plants help to reduce the acidity of the water.

Water tank pH level of the water in the tank
Start 1 hour 2 hour 3 hour 4 hour 5 hour 6 hour 7 hour 8 hour
5 fishes and no aquatic plants 7.2 6.9 6.6 6.3 6.0 5.7 5.4 5.1 4.8
5 fishes and 2 aquatic plants 7.2 7.3 7.2 7.2 7.3 7.3 7.2 7.3 7.2
5 fishes and 4 aquatic plants 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0

Use the below graph to plot the results of above observation.

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Complexity level:
5
Project cost ($):
35
Time required:
1 hour to prepare, 8 hours for experiment
Material availability:
Easily found
Safety concerns:

None