| A | B |
|---|
| prediction | educated guess about what will happen |
| vial | small container for holding liquids |
| solution | mixture of two or more substances |
| factor | something that contributes to the outcome of an experiment |
| variable | a factor that can be changed |
| controlled variable | a variable that remains the same |
| diffusion | spreading or scattering |
| observing | watching to see what happens |
| buoyancy | property of floating in a liquid |
| density | property of having parts crowded together |
| contaminate | pollute, make dirty |
