• Clear plastic bin with 1-2 inches of water

• Salt

• Food coloring

• Ice cube tray (or small cups to make ice cubes)

• NOTE: The video to the left is slightly different as they are not using salt water and are using hot water on top. You can do this if you choose!

• In the ice cube tray (or small cups to make ice cubes) fill with water and add several drops of food coloring (you want them pretty dark)

• In the plastic bin, add about 1-2 inches of warm water (no deeper than your thumb)

• Add enough salt into the water until it will no longer dissolve

• Once your ice cubes are frozen, gently place them into the warmer salt water

Ask yourself these questions:

• What do you notice about the movement of the melted ice?

• Do you think the temperature of the salt water affects how fast the ice melts?

  • What does this tell us about the polar ice caps and the rising temperatures of the ocean?

• The ice cubes were fresh water and the “ocean” is salt water. Do you think mixing the two has an effect on how fast the ice melts? Is there a way you could test your hypothesis?