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Different kinds of materials

Different kinds of materials:

1. METALS:

PROPERTIES:

  1. Metals are shiny (lustrous) in appearance.
  2. Metals are flexible, so they can be bent.
  3. Metals are good conductors of heat and electricity.
  4. Metals are hard and strong.
  5. Metals can be heated to high temperature.
  6. Metals are malleable. So they can be beaten into thin sheets.
  7. Metals are ductile. So, they can be drawn into wires.

Uses:

  1. Metals are used to make kitchen utensils, cutlery, containers and jewellery.
  2. Wires drawn from metal are used in cables for electrical fittings in our houses.
  3. Maximum use of metal is in tools and machines.
  4. Magnets made from certain metals are used in toys and machines.

 2. GLASS:

PROPERTIES:

  1. Glass is shiny, smooth and hard.
  2. Glass is hard but heated glass can be moulded to any shape.
  3. It is non-flexible and brittle.
  4. Glass can be powdered when crushed.
  5. Glass is conductor of heat.
  6. Glass is non-conductor of electricity.
  7. We can see though a glass.
  8. We can see into a glass mirror. Mirror reflects the light.

Uses: Glass is used to make door and windowpanes, table tops, mirrors, storage bottles, science apparatus, electric bulbs.

3. CERAMIC

PROPERTIES:

  1. Ceramic is made from dried clay and is polished or glazed.
  2. Ceramic is shiny and smooth.
  3. It is hard and brittle.
  4. Ceramic is good conductor of heat.
  5. It is poor conductor of electricity.
  6. We cannot see through ceramic.

Uses: Ceramic is used to make crockery. It can also be used as an electrical insulator. It is highly used for floor and wall tiles. Decorative vases are made from ceramics.

4. PLASTICS:

PROPERTIES:

  1. Plastic is flexible.
  2. Plastic is bad conductor of electricity.
  3. Plastic melts on heating. It catches fire.
  4. Plastic can be moulded into various shapes.
  5. Light may pass through some plastics.
  6. They are transparent or translucent.

Uses: Plastic is most widely used for making kitchenware, electrical pin-plugs, baskets and carry bags, buttons for shirts and suiting. It is also used for making chairs and stools.

5. FIBRES:

PROPERTIES:

  1. Fibre is soft ang light in weight.
  2. Fibre is strong enough to hold together.
  3. Fibre is poor conductor of heat and electricity.
  4. Fibre is flexible can be spun into threads and woven into fabrics.
  5. Fibre catches fire easily.

Uses: Fibre is used for making clothing material and garments, sheets and curtains. It is used in wipers, especially cotton is used for cleaning floors.

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