Page 7 - SST Class 06

These physical remains such as pots, jewellery, for this period. Early writing was on rocks and
tools, coins, bones, etc help them in reconstruct-. pillars, copper plates, clay tablets, palm leaves
ing the past. and on the barks of the birch trees. Later, paper

The period after the invention of writing is began to be used. The invention of printing
known as history. Written records are available made the production of books easier. Historial
records became much more detailed.

Preshistory History
3 millions years 3000 BC to nowadays
to 3000 BC

PALEOLITHIC MESOLITHIC NEOLITHIC MEDIEVAL MODERN CONTEMPORARY
AGE AGE AGE AGE AGE AGE
3 millions to 3000 BC to 476 AC to 1492 to 1789 AC
1000 BC
1000 BC 476 AC 1492 AC 1789 AC 2020 AC

Use of fire Invention of Fall of Western
1 million years Writing Roman Empire
BC 3000 BC 476 AC French Revolution
1789 AC

Agriculture Columbus
First human species begins discovered
2.5 millions years BC 1000 BC America
1492 AC

HOW DO WE MEASURE THE PAST? ten years is called a decade and a period of one
Years, Decades, Centuries hundred years is called a century. Were you born
Dates are used to help us to identify and remem- in the 21st century? When were the members of
ber when things happened in the past or when your family born? Were they born in the 20th
century?
people lived. History is recorded in dates. We
record dates in years and these years make up a You will notice that the 21st century begins with
sequence of time periods. Sometimes, we put dates from the year 2000 onwards. The 20th
dates on timelines to help us to work out when century means dates from 1900 to 1999. You
things happened or when people were born. can identify the name of the century by looking
Looking at dates and timelines helps us to see at the dates in the century that came before it.
how long ago things occurred. For example, the 15th century covers the years
Historians mark time in dates and years and in from 1400 to 1499. If we want to find out about
longer periods of time. For example, a period of life in the 19th century, we find out about what
happened between the years 1800 and 1899.

Social Science-6 7