TEC History - Invention

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Across
  1. 6. Waves used by radio.
  2. 8. Used for writing and drawing.
  3. 9. Inventor of paper.
  4. 10. Device used to send and receive sound.
Down
  1. 1. A device that shows moving pictures and sound.
  2. 2. Used to buy goods and services.
  3. 3. System before money.
  4. 4. The black material inside a pencil.
  5. 5. Inventor of radio.
  6. 7. Country where paper was invented.