| A | B |
|---|
| ice ages | long periods of freezing weather that ended about 10,000 years ago |
| land bridge | a long strip of land connecting two continents |
| Mesolithic Era | Middle Stone Age |
| migrate | to move to a new place |
| agriculture | farming |
| domestication | the process of changing plants or animals to make them more useful to humans |
| economics | the social science dealing with the production, distribution and consumption of goods and services |
| irrigation | bringing in water to fields by digging ditches to lakes, streams and springs |
| kiln | chimney-like building used to harden clay/mud |
| megaliths | huge stones used as monuments or as sites for religious gatherings |
| Neolithic Era | New Stone Age |
| politics | the art or science of government or governing; controlling a group in order to get or maintain control |
| spinning whorl | weights that held a spindle for weaving cloth |
