( Unit 5 )Keywords 1

A society that is organized and has leaders and a

special way of living.

• Century

• Civilization

• Explorer

• thousand

A time period of 100 years.

A picture or pattern made using many small pieces of colored stone or glass.

• mosaic

• explorer

• preserve

A paper with information on it, especially an important paper.

• document

• thousand

• civilization

To keep something as it is and not let it be damaged or destroyed.

• century

• preserve

• thousand

A place where something happened or where people lived in the past.

• historical site

• preserve

• explorer

Number 1000

• century

• explorer

• thousand

Someone who travels to places where no one has been before to find out what is there.

• explorer

• civilization

• historical site