| A | B |
|---|
| prediction | a guess of what will happen in a particular situation |
| hypothesis | an educated guess to a problem |
| observation | the act of using your senses to collect information |
| vial | a small glass or plastic container used to hold liquids |
| liquid solution | a mixture in which the particles of one substance are dissolved into another substance |
| variable | something that is changed in an experiment |
| controlled factor | something that is not changed in an experiment |
| diffusion | a gradual mixing together of gases and liquids |
| density | the amount of matter (stuff) in a certain volume (space) |
| contaminate | to make unclean or impure by contact (touching) |
