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.
Frequently asked questions
Is the “Classify reaction energy” worksheet free?
Yes. “Classify reaction energy” is a free printable Science worksheet. Sign in with Google or email to download the PDF instantly.
What grade or age is this Science worksheet for?
It's designed for Middle School (ages 11–14), covering Chemical reactions.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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