| ancestor | | The passing on of history, beliefs, or customs by word of mouth. |
| fossil | | The overthrow of an existing government and its replacement with another; any sudden or very great change. |
| theory | | The period before events were recorded in writing. |
| primary source | | An object made by someone in the past. |
| erode | | A first hand account of an event or an artifact created during the period being studied. |
| agriculture | | A great sheet of ice that moves slowly over a land surface. |
| artifact | | The story or record of what has happend in the past. |
| plow | | A person of the Old Stone Age who met his needs by hunting animals and gathering plants. |
| hunter-gatherer | | A level platform of earth built into a hillside, usually used for farming. |
| descendant | | An instrument used to break and turn soil before planting crops. |
| extinct | | The period beginning 12,000 years ago and ending 6,000 years ago. |
| Paleolithic era | | To carefully dig up, as in an archaeological site. |
| terrace | | Something born from an ancestor. |
| oral tradition | | To move from one place to another to live, especially a large group of people. |
| technology | | The gradual wearing away of soil and rock by wind, glaciers, or water. |
| secondary source | | A time period stretching from 2.5 million years ago to about 12,000 years ago. |
| prehistory | | A farming method involving the cutting of trees, then the burning of them to provide ash-enriched soil for the planting of crops. |
| glacier | | To train plants or animals to be useful to people. |
| archaeology | | The use of skills and tools to meet practical human needs. |
| migrate | | The remains or imprintsof something for which there is evidence but no ginal proof. |
| revolution | | A record of the past, based on information from primary sources. |
| excavate | | A plant or animal that no longer exists. |
| history | | An idea or explanation of something for which there is evidence but no final proof. |
| slash and burn | | The raising of crops and animals for human use, |
| domesticate | | A relative from the distance past. |
| New Stone Age | | An extra supply of something, such as crops that are not needed immediately for food. |
| surplus | | The study of the remains of past cultures. |
