Alright, thinking of different things I could test in relation to buoyancy.
1. Buoyancy of different types of objects. Independent variable would be the object used, while dependent variable would be whether it floats/how much it floats.
2. How different types of liquids affect the bouyancy of an object. Independent variable would be liquid used, while dependent variable would be how much the object floats.
3. How the degree of salinity in water affects the buoyancy of an object. Independent variable would be the amount of salt used, while dependent variable would once again be how much object floats.
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