Across
- 4. Mesopotamians were the first to use this alloy, and it is used today in coins.
- 5. The first law made by humans. There are 282 of these laws.
- 6. A numerical system with 60 as a base. A modified version is still used to measure time to this day.
Down
- 1. The first writing system, made out of symbols that meant specific things instead of letters representing sounds.
- 2. A basic device used in other technology to this day.
- 3. Curved, symmetrical buildings usually made as support.