Diffusion. Particles more from high concentration (where there is more) to low concentration (less particles).
-Aim: Investigate if particles diffuse faster in hot or cold water.
-Hypothesis: I think it is going to move quicker and diffuse faster in hot water, because particles move faster in hot water and slower in cold water.
-Results: What we saw was that that in the cold water they purple stuff started spreading but really slowly, and in the hot water the purple stuff moved a lot faster.
-Discussion: This happened because particles move faster in hot water.