Across
- 3. ancient forerunner of tupperware
- 4. laid the groundwork for modern math
- 5. made possible with the invention of the wheel
- 8. made art with copper
- 9. build buildings at faster rates
Down
- 1. better quality clothes at faster rates
- 2. scientific basis for modern irrigation
- 6. allowed farmers to break up soil and bury crops
- 7. scribes used sharpened reeds to scratch symbols in clay