Plastic Bottle (soda or water)
Clear Straw (plastic)
Clay or Playdough
#1: Fill half the bottle with rubbing alcohol
#2: Fill the rest of the bottle with water
#3: Add a few drops of food coloring and shake the bottle to mix up the color
#4: Place the straw in the bottle
#5: Place the clay around the rim of the bottle to hold the straw about ¼ inch from the bottom of the bottle.
#6: You are now ready to use your thermometer. You can place it in cold and warm places to see the liquid rise and lower on the straw.
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