This is a mess free way to help students understand the concept of density in liquids.
Use 7 different test tubes that you can seal and create 2 liquid density columns. Students will color the different mini columns on their lab sheet. They are then asked to analyze their data and color what they think would happen if all 7 liquids were combined.
We dyed some of our liquids to make the different liquids more obvious.
Supplies needed: 7 sealable test tubes or small beakers