Across
- 2. Diffusion:The spread/blending of ideas/customs among people.
- 5. 365-day chart based on the sun's cycles.
- 6. Developed a system of numbers.
- 7. in the same family, passed from father to son
Down
- 1. and used for writing.
- 3. major advance for writing.
- 4. created for going to places faster.