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Machines: Then and Now

  •  English    15     Public
    Simple machines
  •   Study   Slideshow
  • What’s this?
    sundial
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  • What are these?
    arrow and bow
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  • The buffalos are _______ the soil.
    Plowing
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  • The clock has a ______.
    Pendulum
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  • What’s this?
    windmill
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  • Which one makes electricity? wind turbine or windmill
    Wind turbine
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  • The king is riding a _____.
    chariot
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  • /What’s this?
    Watermill
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  • Something that people made many years ago.
    invention
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  • What is your favorite invention? Why?
    great!
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  • What’s the most useful invention? How?
    awesome!
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  • Is this a MECHANICAL or DIGITAL clock?
    digital
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  • Is this a MECHANICAL or DIGITAL clock?
    mechanical clock
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  • Name 2 simple machines.
    ramp, pulley, lever, wheel and axle, wedge
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  • Before clocks, how do people tell time?
    sundial or the sun
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