| A | B |
| Circa | Latin word for "about" or "around" |
| Decade | 10 Years |
| Century | 100 Years |
| Millennium | 1000 Years |
| B.C. | Indicates the period of time before the birth of Christ |
| A.D. | "anno Domini" in Latin, refers to the years since Jesus' birth |
| B.C.E | Before Common Era - sometimes used instead of b.c. |
| C.E. | Common Era - sometimes used instead of a.d. |
| Technology | The use of skills and tools to meet practical (human) needs |
| Old Stone Age | The period until about 40,000 to 10,000 or 12,000 b.c. when the use of stone tools was wide spread |
| Hunter-Gatherers | People who meet there needs by hunting animals and gathering plants |
| Border Cave | located in Zululand, South Africa, it is a cave in the side of a cliff which was used for hunting and shelter |
| New Stone Age | A period of time from c. 12,000 b.c. to c. 6,000 b.c., when people developed agriculture and used stone tools |
| Agriculture | The raising of crops and animals for human use |
| Domesticate | To train plants or animals to be useful to people |
| Surplus | An extra supply of something |
| Specialization | Having a particular skill or doing a specific job |
| Civilization | A culture with developed systems of religion, learning and government |
| Trade | An exchange of goods |
| Nomad | A member of a group of people who have no fixed home and move according to the seasons from place to place in search of food, water, and grazing land |