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Layered: How Does Hail Form? (page 2)

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Author: Janice VanCleave

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Layered

  1. To show the individual layers in a hailstone, repeat the original experiment using water mixed with food coloring. Alternate layers of colored and uncolored water, or use different colors for each drop added. Display drawings of this experiment along with a summary of the results.
  2. Grow a complete hailstone on a thread. Start the growing process by placing a piece of wax paper in a saucer. Lay the end of a 6-inch (15-cm) piece of thread in the center of the paper. Use an eyedropper to place one drop of water over the end of the thread. Place the saucer in the freezer. After one hour remove the thread and the piece of ice from the paper. Use tape to secure the free end of the thread to a pencil. Place the pencil across the mouth of a quart Oiter) jar with the thread and the pellet of ice hanging inside the jar. Place the jar in the freezer. Prepare a cup of subcooled water as in the previous experiment. After 30 minutes, remove the jar from the freezer. With the pencil, lift the ice stone out of the jar and dip it into the subcooled water. Replace the pencil and the stone in the jar as before and return the jar to the freezer. Repeat this procedure three times. Photographs can be taken and displayed to show the change in the size of the simulated hailstone.
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