Wednesday, 19 April 2017

SOCIAL SCIENCE UNIT 6: MEASURING TIME



Contenidos:
-Las principales edades de la Historia. Orden y hechos que marcan su final e inicio.
-La lectura de los años en inglés: parejas de cifras.
-Siglos: concepto y asociación de año y siglo.
-Ordenación de nuestras edades históricas atendiendo a los conceptos de antes y después de Cristo.

Criterios de evaluación:
-Nombra y ordena las grandes edades de la Historia.
-Describe algunos acontecimientos importantes que marcan el cambio de era.
-Lee correctamente años de hasta cuatro cifras en inglés.
-Explica lo que es un siglo.
-Asocia un año dado con el siglo al que pertenece.
-Comprende la importancia de agrupar la Historia en edades para poder estudiarla y entenderla.
-Explica el significado e importancia de dividir la Historia en antes y después de Cristo para entenderla.

Vocabulary:

History
Prehistory
Ancient Age
Middle Ages
Early Modern Age
Modern Age
Year
Century
Before Christ
Anno Domini
Hunting
Agriculture
Fire
Writing
Roman Empire
Discovery of America
French Revolution


The Earth is over 4 billion years old, yet the first humans appeared much later. We have been on Earth for about 190,000 years.



We divide the human existence on Earth into Prehistory and History. Prehistory is the age before writing existed. When humans start writing, History begins.

The main eras of human History are:
  1. Prehistory. People hunted before they started raising their own animals. They discovered fire and practiced agriculture. 
  2. Ancient Age. It started when people invented writing, 3000 years B.C. The main civilizations in Ancient Age are the Egyptians, the Greeks and the Romans.
  3. Middle Ages. They started when the Roman Empire came to an end. Kings and noblemen lived in castles, while peasants worked in the fields. 
  4. Early Modern Age. It started when Cristóbal Colón (Christopher Columbus) discovered America in 1492. It was an important era because some European empires such as Spain and France expanded and became very rich.
  5. Modern Age. It started in 1789, with the French Revolution and comes to our days! Things have changed a lot along this era. Industrialization meant machines appeared to make our lives easier. We all use machines everyday: computers, fridges, cars, mobile phones and so on!


In English, years are read by breaking them into two parts:
  • 1987: 19-87, nineteen eighty-seven
  • 2015: 20-15, twenty fifteen
  • 894: 8-94, eight ninety-four
  • 521: 5-21, five twenty-one

When there are two zeroes in the middle of the number, we read it simply:

  • 2004: two thousand and four
  • 1007: one thousand and seven

When the year only has two numbers, we read it simply:

  • 29: twenty-nine
  • 94: ninety-four



One hundred years make a century. People measure time in centuries, it is so much easier. To know what century a year belongs to, we have to take the first two digits and add one:
  • 1945: we take only the first two digits, 19. We add one: 19+1: it belongs to the 20th century.
  • 2017: 20+1: it belongs to the 21st century.
  • 1722: 17+1: it belongs to the 18th century.
We use ordinal numbers to write centuries. In Spanish, centuries are written by using Roman numbers: XIX, XX, XXI...
We divide History into two big parts:
  1. Before Christ (B.C.). Up until the Ancient History age is over.
  2. After Christ / Anno Domini (A.D.). It starts in the Middle Ages.

Unit Mind Map: