Describing Material Properties

Activities to try

1. 1

   Materials test bench: watch the property happen

   Why it works: A property is a behaviour a material shows when you act on it, so a describing word is something you can test and watch happen — not a guess from how the material looks.

   1. Set up or use a bench with real materials and simple test tools: a water dropper, a bend/stretch station, and a torch or light source.
   2. Drip the same small amount of water onto a plastic raincoat/sheet and onto a paper towel. Watch the drops bead up and roll off the plastic (waterproof) and soak in and darken the fibres of the towel (absorbent). Say the two property words aloud for what you saw.
   3. Shine the torch beam AT a clear plastic sheet, a piece of tissue, and a wooden block, and look at where the beam lands — do not look back toward the light. Notice the beam passes clearly through the clear sheet (transparent), only some light glows dimly through the tissue (it lets some light through, so it is neither fully transparent nor opaque — sometimes called translucent), and the light is stopped by the wood (opaque). Name what each did.
   4. Try two separate tests: stretch an elastic band (it pulls LONGER when you pull it — stretchy) versus a stiff stick (it does not give — stiff); then bend a bendy strip (it CURVES or folds when you push it — bendy) versus the stiff stick (it will not bend — not bendy). Feel how stretching pulls something longer while bending curves or folds it.
   5. Record each result in a property grid — materials down the side, property words across the top — writing or stamping the word only after you have seen the test.
2. 2

   Name the property: tap-and-reveal vocabulary scaffold

   Why it works: Each property word has a clear opposite and attaches to example materials, giving children the vocabulary they will then verify by testing.

   1. Explore a scene of familiar materials (sponge, window, brick, elastic band, metal spoon, wooden block).
   2. Tap or point to each one to hear/say one or two property words for it — e.g. sponge: 'soft, absorbent'; window: 'hard, transparent'.
   3. Match opposite-pair cards: shiny↔dull, rough↔smooth, waterproof↔absorbent, transparent↔opaque, stretchy↔stiff, bendy↔not bendy.
   4. Play 'guess then check': predict a material's property, then lift the flap (or run the real test) to see the result.
3. 3

   Sort and match: check the words are secure

   Why it works: Property words are secure when a child applies them correctly across varied examples and keeps distinct properties apart.

   1. Drag materials into category bins: transparent vs opaque; waterproof vs absorbent.
   2. Match each material to the property word(s) that describe it.
   3. Answer picture-and-audio questions about properties — but only for materials you have already tested.
   4. Separate confusable cases: sort a soft plastic bag (soft but waterproof) and a rough dry sponge (rough but absorbent) so each property is judged on its own.