a flow as the dye swirls and spreads throughout the volume. What appears to be a collective motion of only the dye molecules at the macroscopic level is on the microscopic level the random motion of both the dye and water molecules. The perceived flow, really just an evolving map of the dye concentration, ceases once the dye is evenly distributed, the molecular motion does not. Levels are the signature of emergent processes [4]. Students, however, tend to be drawn to causal explanations as they are more likely to resonate with common sense. We argue in this paper that the weight of a gas like air is an emergent phenomena and explicit discussion of how a container of air affects a weighing scale is needed to avoid misconceptions.