Project title Digestion and cat food Difficulty Level Middle school Project page  Click here to view this science project Description This science fair project was performed to examine how much of the cat food eaten by the feline is actually digested and absorbed. The tests were done using 4 brands of cat food � IAMS, Friskies, Pet Promise and Nutro Natural Dry.For this science fair project, the independent variable is the brand of cat food (IAMS, Friskies, Pet Promise and Nutro Natural Dry). The dependent variable is the amount of food that is digested by the cat. The constants (control variables) are the amount of cat food that the cat is fed, the pH level of hydrochloric acid, the amount of acid used, and the amount of meat tenderizer used. 2. Label the4 beakers according to the cat food brands: IAMS, Friskies, Pet Promise and Nutro Natural Dry. 3. Pour hydrochloric acid into a larger beaker and mix it ..... View our all-time most popular science projectsComparing the learning abilities of hamsters and miceWhat colors are birds attracted to?

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