Answer these questions
1. what was the main discover in that time?
2. when did the metal ages begin?
3. What was the use of a plough?
4. What metal working techniques were used during this period?
5. What happened to the population and settlements during this time?
6. Describe the megalithic monuments: a mehir, a stone circle, and a dolmen?
7. What were the main inventions of this period?
