As students created a consensus for the behaviors of gases, how does this relate to odors, which are gases, too?
Using a simple demonstration with some "mystery liquids" that appeared the same, students discovered that by using some indicator paper coming in direct contact with the liquids, they were actually quite different.
But how can we explain the indicator paper changing colors when it never comes in contact with the liquid in a closed container? Through a great discussion, students determined that the odors evaporating off the liquid have something to do with it. Our consensus is to the left! Great work!