Materials notes - properties and uses of different materials.

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Materials (definition) = Substances that an object is made of

Materials are used to make many non-living things.


Wood (chair / doll / book)

Rubber (eraser / tyre)

Metals (ornaments / metal ruler)

Leather (wallet / shoe)

Rocks (bricks)                                                More than one material can be

Glass (spectacles / mugs)                                used to make a single object

Cotton (shirt / skirt)                                        (eg: bulb ← metal + glass)

Plastic (toys / outer covering of pen)                        (eg: shoe ← rubber+metal+leather)

Copper (electric wire)

Clay (brick/ flower pots)

  • Where do we get these materials?

  1. Man made – plastic, nylon, Styrofoam
  2. Ground – rocks, glass, metals(iron/copper), sand, clay
  3. Plants – wood, cotton, rubber)
  4. Animals (leather, wool, silk

We must Reduce, Reuse & Recycle materials

  • Why must we study about materials?
  • to know their characteristics → choose the right material for the manufacturing
  • When you choose materials to make an object, you must know
  • The properties of the material
  • Uses of the object

        Some characteristics (properties) of materials:

  • Shape/size/colour/shiny/taste
  • hard / soft (texture)
  • strong / weak (strength)
  • heavy / light
  • flexible / stiff
  • sink / float in water
  • water proof
  • degree of transparency to light
  • durable (not easy to break)
  • conduct heat
  • heat resistant
  • doesn’t rust
  • malleable (easy to change shape by bending – copper)
  • magnetic/nonmagnetic
  • conduct electricity or not
  • soluability


Key/gold > Melamine > Wood > Rubber

(gold is stronger than melamine) (wood is stronger than rubber)


Iron > Ceramic

Metal cube > glass cube > rubber cube > cork cube

Questions on Comparison (ascending / descending order):

        Step 1 → draw the scale & mark both ends

Step 2 → write objects with SPACE in between (to slot in)


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Why we use these materials?



Grouping of objects into sets according to one or more common properties.


Classified using their properties (similarities/differences)

  • colour
  • flexibility
  • hardness
  • strength
  • degree of transparency to light
  • magnetic property
  • thermal property
  • electrical property
  • density
  • boiling point & melting point
  • malleable (can change shape without breaking)
  • ductile (capable of being hammered out thin)


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