Grouping Materials
Compare and group everyday materials based on their simple physical properties
What a learner can do afterwards
- Sort a set of materials into groups based on a chosen property (e.g. transparent vs opaque)
- Compare two materials and state which properties they share and which differ
- Explain the reasoning behind a grouping decision using property vocabulary
The lesson
You know that materials have properties. Some are hard, some are soft. Some are shiny, some are dull. You can use these properties to make groups.
Sam has a marble, a sponge, and a rock. The marble and the rock are hard. The sponge is soft. Sam makes two groups: hard and soft.
A glass cup and a paper cup can both hold water. But the glass cup is see-through. The paper cup is not. They share one thing. They differ in another.
To group things, pick one property first. Then check each item one by one. Ask: does it have that property?
Pick a property, then sort things by it, and say why.
Watch it
Where it sits
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.