Matter and Its Properties
MYP Sciences Year 2 — Matter and Its Properties (MYP has no fixed numerical syllabus codes like DP; content maps to the MYP Sciences framework strands: scientific knowledge of matter, separation techniques, particle theory, and physical/chemical change)
Every question in this topic is really asking one thing: can you tell substances apart using evidence, not appearance? A yellow powder that decomposes when heated and a yellow powder that doesn't are completely different categories of matter — the colour tells you nothing. Examiners build almost every question here around a table of data, a diagram of particles, or a graph, and expect you to read the evidence rather than guess from what something looks like.
Overview — The Shape of This Topic
This topic builds outward from the smallest scale to the observable one. You start with the atom (what a single particle of an element actually is), zoom out to how atoms combine or mix to form elements, compounds and mixtures, then use the physical differences between substances to separate them apart again. Acids and bases are a special, heavily-tested category of compounds identified by indicators. Finally, particle theory explains why matter behaves as solid, liquid or gas, and physical vs chemical change asks you to judge, from evidence, whether a new substance has actually been formed.
- Every classification question (element/compound/mixture, physical/chemical change) is decided by a test, not a look — decomposition by heat, new properties forming, reversibility.
- Chemical symbols are an international language: one capital letter, optionally one lowercase letter, never shared between two elements.
- Separation techniques are chosen by matching the technique to the specific physical property difference between the substances (solubility, particle size, boiling point, density, magnetism).
The shape of the chapter
Command terms that decide your marks in this topic
| Command term | What it demands | AO | Mark-earning move |
|---|---|---|---|
| State | Give a short, precise answer — a word, phrase or single fact. | Criterion A | One correct fact scores the mark; adding reasoning wastes time but never loses marks. |
| Identify | Pick out the correct item from data given (a table, diagram or list). | Criterion A | You must point to something specific in the stimulus — 'the element' is not enough, name W or Y. |
| Describe | Give a detailed, accurate account of what is observed or how something works. | Criterion A/C | Needs more than one word but no explanation of why — sequence and detail earn the marks. |
| Explain | Give reasons — link a cause to an effect. | Criterion C | A fact alone gets half marks; you must add 'because...' linking it to particle theory or a definition. |
| Compare | Give both similarities AND differences between two things. | Criterion C | Stating only a difference (or only a similarity) caps you at half the available marks. |
| Distinguish | Explain the difference between two easily confused things. | Criterion C | One clean discriminating feature scores full marks; a long description of both without contrast does not. |
| Deduce | Reach a conclusion using evidence given, not prior knowledge alone. | Criterion C | You must reference the specific data point (e.g. 'decomposed by heat') that led to your conclusion. |
| Justify | Give reasons that support a stated claim or conclusion. | Criterion C | The claim must already be stated (yours or given) — you supply the supporting evidence, not a new claim. |
Key point
Overview