Across
- 2. Gunpowder was later used to make these for celebrations.
- 4. Bi Sheng developed ______-type printing during the Northern Song Dynasty.
- 6. The compass became especially useful for this activity.
- 7. This invention allowed people to produce many copies of texts.
- 10. Before paper became common, people wrote on this plant material.
Down
- 1. This invention made writing and keeping information easier.
- 3. Before paper became common, people also wrote on this soft material.
- 5. This invention helped travellers and sailors find directions.
- 8. This invention was later used in things such as fireworks.
- 9. People used this material to make books and records.