Editing Density Rainbow (section)

===Method C===
# Measure out 100 mL of water in each of the beakers. Start heating one on the hot plate, and add ice to another and let it cool down.
# Add 2 drops of food dye to each of the beakers; red in the hot beaker, green in the room temperature beaker, and blue in the cold beaker.
# Once the hot beaker is hot, turn off the heat plate. Add the blue water to the large beaker first. Then add the green water, pouring it over the back of a spoon to ensure it spreads out and doesn't mix much. Repeat for the red water, and if done correctly the solutions should stay mostly separated!
# The solutions will mix over time as the temperatures become more balanced, so plan to reset this demonstration every 15 minutes or so.