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Classify reaction energy

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Classify reaction energy — free printable Middle School Science worksheet

Middle school students classify types of chemical reaction energy — exothermic and endothermic — in this Physical Science worksheet on Chemical Reactions, examining where energy goes as bonds break and form. Teachers can use it to sharpen the conceptual distinction between energy-releasing and energy-absorbing reactions before a lab. Understanding reaction energy classification is a foundational skill for high school chemistry and biochemistry.

Learning objectives

  • Classify chemical reactions as exothermic or endothermic based on energy changes
  • Identify observable evidence that indicates energy is released or absorbed
  • Explain how bond breaking and bond forming relate to energy change in a reaction

How to use this worksheet

  1. Select “Sign in / Sign up to download”, then sign in with Google or email to get the PDF from KiwiBee Printables.
  2. Print at home or in class for Middle School; it's no-prep, with no extra materials needed.
  3. Use the included answer key to mark it in seconds.

Good for

ClassworkHomeworkWarm-upCentersSmall groups

Answer Key

Answer key for Classify reaction energy — free printable Science worksheet

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