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Simple and Complex Machines

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  • What is the main function of a light bulb?
    To produce light using electricity.
  • Which simple machine helps you split things apart?
    Wedge.
  • Mobile phones are not machines.
    False
  • What kind of energy transformation happens in a steam engine?
    Heat energy is turned into mechanical energy.
  • Fridges keep food cold.
    True
  • Dishwashers use water and electricity to clean dishes.
    True
  • Telephones allow people to talk from far away.
    True
  • A car is a complex machine because has levers, wheels and axles, and other parts working together. True or False.
    True
    False
  • Are steam engines still commonly used today?
    No, they're mostly replaced by modern engines.
  • What kind of simple machine is a ramp?
    Inclined plane.
  • Mobile phones can send messages and take photos.
    True
  • Which simple machines are part of a computer mouse?
    Wheel and lever.
  • What does a steam engine use to create power?
    Steam from boiling water.
  • Is a bicycle a simple or complex machine?
    Complex machine.
  • What kind of simple machine is a screw?
    An inclined plane wrapped around a cylinder.
  • Washing machines use both electricity and motion.
    True
  • Dishwashers clean clothes.
    False
  • Fridges use mechanical energy only.
    False
  • An iron is used to remove wrinkles from clothes.
    True
  • Name two simple machines found in a pair of scissors.
    Lever and wedge.
  • Washing machines clean clothes with water and detergent.
    True
  • What is a complex machine?
    A machine made up of two or more simple machines working together.
  • Telephones are simple machines.
    False
  • What are computers mainly used for?
    Storing information , solving problems , and running programs
  • Radios use electrical energy.
    True
  • Is a computer a simple or complex machine?
    Complex machine.
  • Televisions only play sound.
    False
  • What does a lever do?
    It helps lift or move heavy objects with less effort.
  • A television uses both sight and sound.
    True
  • Is a light bulb a simple or complex machine?
    Complex.
  • An iron is used to heat up food.
    False
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