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Project title Acid rain and the survival of fresh water guppies (Poecilia reticulata)Featured science projectScience project video
Difficulty Level Elementary school
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Description
The mortality rate of fresh water guppies (Poecilia reticulata) increases as the acid level in the water increases. 

Instructions preview
*For this experiment, the independent variable is the acidity or pH level of the water in the fish tanks. The dependent variable is the number of fish that remain alive in the tank over time. This is determined by counting the fish that are still alive every 2 hours. The constants (control variables) are the type of fish selected, the age of the fish (all fully grown), the solution used to make the water acidic and the amount of water in the tank, the water used for each tank, and water temperature and lighting conditions. *The 5 fish tanks .....
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