Th is activity explores relationships between a fl uids density and convection currents. Does hot water rise and cool water fall? a. Make several ice cubes that have been dyed with food coloring. b. Place an ice cube gently in a beaker of warm water. c. Observe the ice-water mixture for several minutes. d. Empty the beaker, and refi ll it with warm water. Add as much salt as will dissolve in the water. e. Repeat steps b and c. f. What diff erences did you observe between the fresh water and the salt water?
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