Activity 19

By Maddalen_I.m
  • OBELISK
    3500 BCE

    OBELISK

    The obelisk clock was invented by the Egyptians around 3500 B.C
    They were large obelisks that cast a shadow from sun. Buy they did not works at night or no cloudy days, and they were not every accurate
  • Water clock
    2000 BCE

    Water clock

    The water clock was invented in 2000 B.C. This device was basically a bowl with a hole in the bottom. Again they were not very accurate and would not work in freezing weather
  • Mechanical clock
    14

    Mechanical clock

    The mechanical clock was invented in the 13th and 14th centuries and was developed in Europe.
  • Mechanical water clock
    1088

    Mechanical water clock

    The mechanical water clock was invented in 1088 in China. The creator of this clock is "Su sung" and had an hour hand only because it was not accurate enough to have a minute hand
  • The sandglass clock
    1300

    The sandglass clock

    The sandglass clock was invented in 1300. This clock was first used in Europe. Sand fell through a small hole in a glass tube. They are still in use today to measure small amounts of time