These four lessons share one rule: explain the science in the question, and do not advise or diagnose anyone. The rule keeps answers inside the syllabus and inside what the evidence can support.
The sub-cluster sits under chemistry in health contexts in the SPM Science guide.
What does this sub-cluster cover?
The lessons handle four situations. A class graph with no names attached, a statement that mixes a mechanism with a recommendation, a textbook model that simplifies reality, and a claim that changes over time and needs a current source.
How do the parts connect?
Each lesson asks a version of the same question: what does this evidence or statement support, and where does it stop? Start with data, then mechanism, then the limits of models, then sources.
| Lesson | Question it answers |
|---|---|
| Anonymised classroom graph | What does group data show? |
| Mechanism against recommendation | Is this explaining or advising? |
| Limits of a model | What does the diagram leave out? |
| Claims needing a current source | Does this need checking today? |
A short orienting example
“Sweating cools the body because evaporating water takes heat from the skin” is a mechanism. “So you should drink this product after exercise” is a recommendation.
The exam rewards the first sentence. The second needs a qualified source and information about the person.
Who should start where?
If graphs of class data are the weak point, start with the first lesson. If your answers drift into advice, start with the second. For practice on fair comparisons, use the graph evidence comparison lab.
To work through these lessons with a teacher, see online one-to-one Science tuition.