Across
- 3. Advances in______ made farmers lives easier.
- 6. the_____ helped people push heavy loads.
Down
- 1. Han___ had to grow enough food for their families.
- 2. the iron_____ were stronger than the other plows.
- 4. the ____ pump made it easier to move water.
- 5. The Chinese were the first to pour_____ into molds.