MYP Chemistry Criterion D: Reflecting on the Impacts of Science

Criterion D asks you to reflect on how a chemistry topic affects real people, society or the environment. It's one of four MYP Sciences criteria (A–D), each marked out of 8, and it tests whether you can discuss ethical, environmental or economic implications using accurate scientific language — not just describe the chemistry itself.

Criterion D has four strands: (i) explain how science addresses a real problem, (ii) discuss and evaluate the implications of that application, (iii) apply scientific language effectively, and (iv) document sources in a recognised citation style. All four need addressing to reach the top 7–8 band, per the IB's MYP: Sciences guide.

Because chemistry doesn't happen in a vacuum — plastics, fertilisers, batteries and medicines all carry consequences. The MYP builds Criterion D so students learn to weigh benefits against risks, a habit examiners later reward in DP Internal Assessments and Theory of Knowledge essays. It's training for scientific literacy, not just exam technique.

Pick one specific, named issue — not 'pollution' but 'eutrophication from nitrate fertiliser run-off in a named river' — then explain the chemistry, discuss real implications for different stakeholders, and cite your sources properly. Markers reward precision and balance over broad generalisations; vague, sweeping answers rarely reach level 7–8.

A level 5–6 response explains the chemistry and lists some implications, but treats them separately. A level 7–8 response weighs implications against each other — balancing economic benefit against environmental cost, for example — using precise terminology and full referencing throughout. The real jump is evaluation, not extra facts.

Expect 'explain', 'discuss' and 'evaluate' — command terms defined precisely in the IB's MYP command terms glossary. 'Explain' wants reasons and mechanisms; 'discuss' wants a balanced consideration of different views; 'evaluate' wants a judgement supported by evidence. Answering a 'discuss' question with a one-sided argument caps your mark regardless of chemistry content.

The three I see most often after years of marking these tasks: choosing a topic too broad to discuss properly ('plastic is bad'), listing pros and cons without ever comparing them, and forgetting the reference list — which alone can cap strand iv at level 1–2 regardless of how good the rest of the essay is.

Teachers set a task — often a short research report, presentation or extended written response — asking you to reflect on a real chemistry-related issue such as fracking, drug synthesis or plastic pollution. It's marked against task-specific clarifications built from the four strands, then converted onto the 0–8 achievement level scale.

Most schools assess Criterion D at least once per year in both MYP 4 and MYP 5, though the exact number of tasks is a school-level decision, not an IB mandate. Check your school's assessment calendar — some units combine Criterion D with Criterion C in a single extended task.

There's no fixed IB minimum — schools design their own assessment plan across MYP 4-5, but most students complete two to four Criterion D tasks per year, generating enough evidence for the 'best-fit' judgement used to determine the final reported achievement level.

Strong topics are narrow and current: microplastics in bottled water, lithium mining for EV batteries, or antibiotic resistance from agricultural antibiotic use. Avoid essay-title topics like 'chemistry and the environment' — examiners can't reward depth of evaluation if the issue is too broad to discuss with named evidence and real stakeholders.

Criteria A–C test content knowledge, inquiry design and data processing — the 'doing science' skills. Criterion D is different: it tests whether you can step back and judge science's real-world consequences using evidence and clear argument, which is why it often demands writing skill as much as chemistry knowledge.

Indirectly, yes. Criterion D builds the evaluative habits DP students need for Internal Assessments and Theory of Knowledge essays, where examiners reward exactly the same skill — weighing implications against evidence rather than simply describing them. It won't appear on a DP transcript, but the thinking transfers directly into DP assessment criteria.

Criterion D is a smaller-scale rehearsal for skills DP develops fully. DP Chemistry's Internal Assessment asks you to evaluate method and results; Theory of Knowledge asks you to evaluate how we know what we claim. Criterion D sits between the two — evaluating consequences rather than methods or knowledge itself.

Practice matters more than memorising facts. Have your child choose a real news story about chemistry and write a short two-paragraph 'implications' response weekly, checking it against the four strands. Structured topical practice mapped to MYP achievement levels makes this far more targeted than generic essay writing.