Across
- 2. :age with artifacts that include windmill, waterwheel, compass, and ocean-going ships.
- 7. :age that ended stone manufacturing. An age of metal made of copper and tin.
- 8. :age with artifacts that include mircrolithics, canoes, bow, domesticating animals.
- 9. :engineers who created aqueduct systems, sanitation systems and the first steam engine.
- 10. :age with artifacts that are of a strong metal used to create spearheads, axes, swords.
- 11. :early age engineers that designed the pyramids and irrigation systems.
Down
- 1. :1st age, artifacts are hearth sites, stone axes, bone needles.
- 3. :age with artifacts that include artifacts are polished stone tools, plow, sickle.
- 4. :early age engineers that designed asphalt covered roadways and used algebra for land excavation.
- 5. :early age engineers that documented information on clay tablets and irrigation systems.
- 6. :engineers who created the crossbow and catapult.