Across
- 7. Farming
- 9. Silver metal and the most abundant element on Earth
- 13. Working class
- 14. Material made of interlacing fibers
- 15. Karl Marx's idea
- 16. Stage 4
- 18. A building used to manufacture goods
- 19. Adam Smith was considered the "father of ___"
Down
- 1. Manufacturing process where unfinished products are transported between workstations
- 2. Work
- 3. Stage 1
- 4. Thomas Newcomen invented this in 1712
- 5. Make something using machinery
- 6. A worker's protest
- 8. Stage 2
- 10. Middle class
- 11. Train tracks
- 12. Large-scale creation of products, typically through a mechanical process
- 15. Stage 3
- 17. A combustible rock often used as fuel
