Alarm Clocks
  • Alarm clocks help keep people from oversleeping.
  • The first alarm clock was the rooster on the farm.
  • Alarm clocks today are usually plugged in, but some have a battery backup.
  • When it is time for the alarm, a loud sound plays until it is switched off.
  • Some alarm clocks today use a radio instead of a beep.


  • Ancient Greeks, Egyptians, and Persians used plant oils for medicine and perfume.
  • The French chemist Rene Maurice Gattefosse first used the term aromatherapy.
  • The first aromatherapy book was published in 1977.
  • Today aromatherapy is used all around the world.

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