Sorting materials into groups

• Material

  Substance used in making objects
• Types of materials

  • Natural occurring materials
  • Man-made materials
• Classification

  The process of sorting and grouping things according to similarities and differences
• Materials can be grouped based on similarities and differences in their properties
• Uses of materials


  Depend on the properties of the material and the purpose it is used for
• Lustre


  The shine of a material. Metals in pure state have lustre.
• Types of materials based on softness and hardness

  • Soft
  • Hard
• Soft materials


  • Balloon
  • Sponge
• Hard materials


  • Eraser
  • Pen
• Experiment to demonstrate solubility

  1. Prepare 4 beakers

  2. Add sugar, sand, water, milk

  3. Observe solubility
• Solubility


  The property of a substance to dissolve in a solvent
• Insoluble substances


  • Sand
  • Copper sulphate
• Miscible liquids


  Liquids that dissolve in water
• Miscible liquids


  • Alcohol
  • Vinegar
  • Milk
• Immiscible liquids


  Liquids that do not dissolve in water
• Immiscible liquids


  • Kerosene
  • Petrol
  • Coconut oil
• Substances that sink in water

  • Stone
  • Key
  • Brass screw
• Transparent materials


  Materials through which you can see clearly
• Transparent materials


  • Glass
  • Water
  • Alcohol
  • Diamond
• Opaque materials


  Materials through which you cannot see
• Opaque materials


  • Wood
  • Paper
  • Cardboard
• Translucent materials

  Materials through which you can see partially
• What are the use of materials?

  Use of material depend on its properties and the purpose for which it has to be used.