Endothermic Science Projects

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One of the major topics in early science classes is energy. In this lesson students learn about endothermic and exothermic reactions and are often asked to demonstrate what these terms mean through an experiment. Endothermic means an experiment requires energy to proceed, but students need to demonstrate this principle safely.

Using Citric Acid and Baking Soda

  • Fill a Styrofoam cup about one-fourth full of citric acid and find the temperature of this initial solution with a thermometer. Stir in a small amount of baking soda and watch as the temperature of the thermometer changes. Add in more baking soda slowly to watch the temperature continue to change. The temperature should become lower and return to room temperature once the reaction is complete.

Melt Ice

  • Hold a piece of ice in your hand and observe how it melts while still feeling cold. Place a new piece of ice in a freezer for an hour and check on it. The ice in your hand melts because your hands are warm and provide thermal energy, but the ice in the freezer does not melt because it is too cold to provide enough thermal energy.

Baking

Feel the Cold with Epsom Salt

References

  • Photo Credit Jupiterimages/Photos.com/Getty Images Ryan McVay/Photodisc/Getty Images Jupiterimages/Creatas/Getty Images Thomas Northcut/Photodisc/Getty Images Jupiterimages/Pixland/Getty Images
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