Editing Density Rainbow (section)

===Method A===
# Set the graduated cylinder on a table with a bin or tablecloth underneath to catch any spills. Add 100 mL of water to the cylinder before the start of the event.
# Let students add one of the other liquids in (but only a small amount) and watch where it ends up. Is it above or below the water? As more liquids are added, they will sort themselves by density, and students will be able to see some clear distinctions between the liquids!
# Let students know that the density of something is equal to its mass divided by the volume it takes up. Give them a small object and ask them to predict where it will float in the cylinder before dropping it in. Was their prediction correct?