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Convection and salinity: How does salinity affect the movement of water?Featured science projectScience project video

Procedure

convection and salinity science fair project

  1. Place the two beakers or jars on the hot plates, side by side.
  2. Fill both containers half-way with water.
  3. In the second jar, add salt to the water and stir until all the salt is dissolved. Keep adding salt until you see grains of salt at the bottom of the glass that do not dissolve despite your stirring.
  4. Add food coloring to thenwater and mix thoroughly.
  5. Pour liquid soap into both containers, enough to raise the total fluid level to three quarters of the containers' volume.
  6. Turn on the hot plates to a low heat setting and observe what happens.
  7. In which container is the movement of the soap more rapid?
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    Complexity level:
    5
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    Safety concerns:
    This science fair project involves a heat source and water. Care should be taken when handling these.