Students sort evidence from opinion, solve an everyday laptop mystery, and apply claim–evidence–reasoning to dissolving-rate data. This independent CER practice worksheet for ages 12–18 (US grades 7–12) includes a printable student worksheet and a separate answer key with model responses.
Use the activity to introduce scientific argumentation before a lab or to revisit how evidence supports a claim. Students learn the three parts of CER, distinguish objective observations from opinions, write a complete explanation for an everyday scenario, and transfer the structure to science data.
WHAT IS INCLUDED
- Print-ready student worksheet with CER explanations, evidence-or-opinion sorting, the laptop mystery, and a bridge to science
- Separate answer key with model responses
Ages 12–18; US grades 7–12. Suitable for biology, chemistry, physical science, environmental science, or introductory science. Single-teacher license. © Osmia LLC.
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