Chinese inventions

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Across
  1. 4. the thin flat substance that you use for writing on or wrapping things in
  2. 5. someone who is trained in science, especially someone whose job is to do scientific research
  3. 6. someone who works on a boat or ship
  4. 7. a set of lines, shapes, or colours that are repeated regularly
  5. 8. a machine, tool, or system that someone has made, designed, or thought of for the first time
  6. 10. the brightly burning gas that you see coming from a fire
Down
  1. 1. a square piece of wood
  2. 2. a piece of equipment used for finding your way, with a needle that always points north
  3. 3. a substance that is used for causing explosions or for making fireworks
  4. 7. the process of making books, newspapers etc, using a printing press to put words and pictures onto paper
  5. 8. to design or create something such as a machine or process that did not exist before
  6. 9. thin smooth cloth made from the fibres produced by an insect called a silkworm