Material Properties Vocabulary
Use technical vocabulary to describe and compare material properties — conductor, insulator, thermal, electrical, transparent, opaque, translucent, soluble, insoluble, magnetic, flexible, rigid, density — and apply these terms precisely when selecting and justifying materials for particular purposes
What a learner can do afterwards
- Classify a set of materials as electrical conductors or insulators and explain why using the correct terms
- Use 'transparent', 'translucent', and 'opaque' correctly and distinctly in descriptions
- Apply at least four property terms correctly when justifying a material choice for a given purpose
The lesson
Some materials let electricity or heat move through them easily. These are called conductors: copper wire is an electrical conductor, and a metal pan is a thermal conductor. Other materials block electricity or heat. These are called insulators: the plastic coating on that wire is an electrical insulator, and a saucepan's plastic handle is a thermal insulator, which is why you can hold it safely.
Zara tests materials for a project. She stirs sugar into water and it disappears, so sugar is soluble. She stirs sand into water and it just sinks, so sand is insoluble. She holds a magnet near a paperclip and it snaps on, so the paperclip is magnetic. She bends a rubber band easily and it springs back, so it is flexible, but a wooden ruler stays straight when she pushes it, so it is rigid. She lifts a small steel ball and a same-size foam ball; the steel ball feels far heavier for its size, so steel has a higher density.
When you choose a material for a job, name the properties that matter. 'This glass works for a window because it is transparent and a good thermal insulator' explains far more than 'it looks nice.'
Words like conductor, insulator, transparent, translucent, opaque, soluble, magnetic, flexible, rigid, and density let you describe and choose materials exactly.
Watch it
Where it sits
Learn first
Nothing; this is a starting point.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.