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What are the 5 periods of the pre-mechanical age?
The Premechanical Age: 3000 B.C. - 1450 A.D.  Writing and Alphabets-- communication.  Paper and Pens--input technologies.  Books and Libraries: Permanent Storage Devices.  The First Numbering Systems.  The First Calculators: The Abacus. 5
What were the five periods of the Stone Age?
Lower PaleolithicMiddle PalaeolithicUpper PalaeolithicEpipalaeolithic/MesolithicNeolithic
What are the five periods in which chemistry was divided into?
Five periods of chemistry
What is the age to have periods?
Normally girls have periods at the age of 12 or 13. But the age starts from 9 to 16.
What are 5 year periods called?
Five-year periods are commonly referred to as quinquenniums.
At what age does menopause usually occur?
Eight out of every 100 women stop menstruating before age 40. At the other end of the spectrum, five out of every 100 continue to have periods until they are almost 60. The average age of menopause is 51
What era's and 3 periods were the age of the dinosaur's?
The Age of Reptiles was the Mesozoic Era. The three periods were the Triassic, Jurassic, and Cretaceous.
What are 4 major time periods of Greek history?
The 4 time periods are listed in order, Mycenaean, Dark Age, Age of Expansion, and Golden Age.
What age are women when their periods end forever?
According to WebMD, the average age at menopause (when your periods have stopped for a full year) is 51, but it is not the same age for everyone.
What are the 3 periods of the history?
Stone Age Bronze Age Iron Age
What age do women stop their periods?
between the age of 45 -55
What were the three periods of stone age?
The three periods of the Stone Age were the Paleolithic Age, Mesolithic Age, and the Neolithic Age. During the Paleolithic Age hunting and gathering were the way of life. In the Mesolithic Age people began to make semi-permanent houses. In the Neolithic Age people started working together and living a community-type life.
