Developing a New, Improved Cold Pack (page 3)

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Author: Muriel Gerhard

Experimental Procedure

  1. State the two problems you are going to investigate in this science fair project.
  2. Create the data sheets you will use to record your observations.
  3. Gather all your materials.
  4. Put on your safety glasses and apron.
  5. Start part 1 to determine which chemical makes the best cold pack. Set up four cups. Label all and one as the control. Pour 50 mL of water into each of the cups.  Measure the temperature of each cup. Record your data. Then add one teaspoon of each of the chemicals in each of the cups and then measure the temperature of the water in each cup again.  Record your findings
  6. Start part 2 to determine what an increase in the amount of the chemicals would produce. Pour 50mL of water into each of three plastic cups, and measure the temperature in each Record data. Then add one teaspoon of each to each of the cups as labeled and measure the temperature again.  Wait a few minutes and take temperature readings again. Record your data. You may want to construct a bar graph showing the results after adding two teaspoons of the chemicals to each one. Prepare your report and include all of the following: a clear statement of the problems, your hypothesis, which chemical you expected to be the most effective and whether there would be a marked different when the amount was increased. List the materials used. Include the safety precautions taken. Describe the procedures used. Include all the data that were gathered. Include all charts and graphs. Formulate your conclusions.   For dramatic value, you may include photos of cold packs, of the materials used or of you in the process of conducting this investigation. Include a bibliography of sources you used. You may wish to assess what you did and describe what you would do differently if you were to do this project again.


  1. CAPT Science Performance Task, Connecticut State Department of Education, released item 2002 for public use.
  2. Chemistry, Anne Marie Helmenstine, Ph.D.



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