Safety boundary
Use supplied datasets and approved simulations. Any physical demonstration must be teacher-supervised and explicitly classroom-safe; no improvised reactive mixtures.
Explicit chemistry instruction
A complete inquiry defense includes the question, competing models, design, raw evidence, analysis, residuals, uncertainty, and revision.
The conclusion should be proportional to the data range and controls actually tested.
Name one additional experiment or variable that could distinguish remaining ambiguity.
Vocabulary: defense; model revision; uncertainty; scope; next test.
Worked example
A proportional concentration-rate model may be supported from 0.10–0.40 M without claiming it remains valid at every possible concentration.
Guided question
Write a CER defending one rate model and identifying one condition that could overturn it.
Independent work
- Submit the inquiry evidence chain.
- Write a final CER.
- Identify one limitation.
- Propose one next discriminating test.
Spiral retrieval bridge
- From Week 21: compare a proposed mechanism with observed rate behavior.
- From Week 20: isolate one condition in a controlled comparison.
- From Week 19: use slope/residual evidence rather than visual impression alone.
Misconception check
Good science can end with a qualified model rather than absolute certainty.
Formative check
What makes an inquiry conclusion appropriately bounded?
Reveal response
It states the evidence, tested range, uncertainty, and what remains untested.
Mentor evidence conference
Ask Archaemenes to audit controls, competing predictions, residuals, uncertainty, and whether the conclusion exceeds the evidence.
Teacher guidance
Foundation: Use a defense template.
Core: Integrate design, residuals, and revision.
Extended: Evaluate model scope and propose next-step evidence.