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Classify reaction energy
Free printable Grade 7 science worksheet for "Classify reaction energy" — practice chemical reactions. No-prep, print or assign online.
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
Answer Key
How to use this worksheet
- Click “Download Worksheet” and sign in with Google or email to get the PDF instantly.
- Print at home or in class for Middle School; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
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