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Main Curriculum Tie:
Supplemental Materials (pdf)
Background For Teachers:
Liquids can be sorted based on their physical properties. Liquids can differ in color, viscosity or thickness, how clear they are, and other qualities.
Plain and salt water have different densities. Food coloring will sink in plain water because it is denser but will float on salt water because it is less dense. In club soda, food coloring will diffuse quickly because the carbonation bubbles help mix the food coloring. Overtime, the food coloring will diffuse throughout all three of the water-based solutions.
Intended Learning Outcomes:
I. Students will classify a group of liquids by observing their physical appearance.
II. Students will watch how a drop of food coloring moves differently in plain water, salt water and club soda.
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