Four Inventions

12345678910
Across
  1. 2. Gunpowder was later used to make these for celebrations.
  2. 4. Bi Sheng developed ______-type printing during the Northern Song Dynasty.
  3. 6. The compass became especially useful for this activity.
  4. 7. This invention allowed people to produce many copies of texts.
  5. 10. Before paper became common, people wrote on this plant material.
Down
  1. 1. This invention made writing and keeping information easier.
  2. 3. Before paper became common, people also wrote on this soft material.
  3. 5. This invention helped travellers and sailors find directions.
  4. 8. This invention was later used in things such as fireworks.
  5. 9. People used this material to make books and records.