MYP Chemistry: Everyday Materials & Their Uses — FAQ

Because the unit looks descriptive — plastics, metals, ceramics — but the marks reward explaining properties using particle structure and bonding, not just naming uses. Students describe what a material does without linking it to why, which is exactly where MYP Criterion D and scientific reasoning marks are lost.

A property is a measurable or observable characteristic (melting point, conductivity, hardness); a use is what the material is applied for because of that property. Examiners want you to state the property, link it to structure, then connect that explicitly to the use — never just list uses on their own.

They're grouped because MYP Chemistry uses them as three contrasting bonding models — covalent giant/molecular, metallic, and ionic/covalent network — so you can compare how different types of structure produce different real-world behaviour. Comparing across all three is what separates a good answer from a great one.

Build a structure-property-use table for every material category first, then practise applying it to unfamiliar materials the examiner hasn't named for you. MYP criteria reward transfer of understanding, so revising named examples alone won't get you a level 7-8 — you need to reason through new ones.

The most common mistake is describing a use without ever mentioning structure — for example, 'glass is used for windows because it's transparent' with no explanation of why covalent network or amorphous structure gives transparency. That answer earns descriptive marks but not the analysis marks in Criterion D.

It's typically assessed through Criterion C (Processing and Evaluating) if it involves an investigation into material properties, and Criterion D (Reasoning and Analysis) for explaining structure-property-use relationships in short-answer or extended tasks — not through a single memorised list of facts.

Compare the property requirements of each part separately, then match each to a structure. A saucepan needs high thermal conductivity and a high melting point (metal, metallic bonding); the handle needs low thermal conductivity and heat resistance (a polymer or composite with covalent structure), so different structures suit different jobs on the same object.

It usually covers metals and alloys, polymers (plastics), ceramics and glass, and composite materials, alongside the bonding models that explain their properties — ionic, metallic and covalent (both molecular and giant/network). Exact content varies slightly by school, since MYP units are teacher-designed within the subject group guide.

It's the direct foundation for DP Chemistry's structure and bonding topic, which covers the same ionic, covalent and metallic models in far greater depth, including lattice enthalpies and intermolecular forces. According to the IB, first exams for the current DP Chemistry guide were 2025, and it still opens with structure and bonding as a core topic.

Natural materials (wood, wool, cotton) occur without significant chemical processing, while synthetic materials (nylon, polythene, PVC) are manufactured through chemical reactions like polymerisation. Both are assessed the same way — through structure explaining properties — but synthetic materials let examiners test understanding of chain length and cross-linking more directly.

It helps, especially if your child's exam responses describe uses without explaining structure — the single most common mark loss in this unit. Topical worksheets that isolate structure-property-use reasoning, separate from the broader unit content, are usually more useful than re-reading class notes at this stage.

Not conceptually harder, but it's more prone to shallow answers because students already know the everyday objects involved and assume familiarity equals understanding. Units like particle theory or acids and bases feel more obviously 'chemistry', so students often under-revise materials relative to how heavily it's actually assessed.