Study

Machines Then and Now

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  • flour
    fine white or brown powder made from grain, especially wheat, and used in cooking for making bread, cakes, etc.
  • arrow
    thin stick with a sharp point at one end, which is shot from a bow
  • steam
    e hot gas that water changes into when it boils
  • fuel
    a material that releases energy when it burns
  • axle
    Bar on which a wheel turns.
  • pottery
    Objects (usually vessels) made of clay and hardened by firing
  • chariot
    a two-wheeled vehicle pulled by a horse
  • cart
    (US) a metal structure on wheels that is used for carrying things
  • batteries
    Stores energy and changes it into electricity.
  • Communication
    A process through which you send messages to and receive messages from others.
  • pendulum
    something that hangs and swings back and forth
  • coal
    a black or dark brown rock consisting mainly of carbonized plant matter, and widely used as fuel.
  • canal
    an artificial waterway
  • satellite
    An object that revolves around another object in space
  • windmill
    An engine powered by the wind designed to produce energy from an inexhaustible source.
  • medicine
    Any drug used to cure, prevent, or treat illness or discomfort
  • watermill
    a building next to a river containing machinery for grinding grain into flour
  • smoke
    the cloud of black, gray, or white gases and dust that is produced by burning something
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