Continue viewing the movies. Describe what happens when the warm water is on the bottom. Describe what happens when the warm water is on the top. Devise experiments to demonstrate the effects of different food colors on the outcome. Devise experiments to measure the densities of both the warm and the cool water.
Chemical reactions require mixing.
Describe how you would combine two solutions to increase mixing without mechanical stirring. Industrial plants frequently combine large amounts under conditions where mechanical mixing is expensive. Go to Top Teachers Guide Purpose To illustrate a consequence of the different densities of warm and cool water. Top Lab Hints Students can perform this as an experiment. Assign students to pairs.