inventions

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Across
  1. 2. small object made of aluminium and glass for capturing or recording visual images, typically through the use of a lens, sensor, and other optical components.
  2. 4. A reflective glass surface that shows images.
  3. 5. an object that displays hours, minutes, and sometimes seconds using hands or digits.
  4. 8. large metal object that can navigate underwater, was invented in 1866
  5. 9. big structure that is used for travel in the space
  6. 10. Small piece of metal created at the time of the Roman Empire that is used to join pieces and make constructions
  7. 12. It was invented by the Italian Antonio Meucci in 1871 and is used to communicate with other people at a great distance.
  8. 13. It was built in 1886 to help people move faster instead of riding horses, it runs on gasoline
Down
  1. 1. invented about 100 BC in China, it is used for writing
  2. 3. A very intelligent inventor who lived in the 3rd century before Christ. Thanks to him, we can now know the volume of a submerged object
  3. 6. It was created in 3500 BC, it helped a lot in transporting heavy objects
  4. 7. Small sticks coated with a material that ignites when rubbed against a rough surface, used for starting fires.
  5. 8. A cleansing substance used for personal hygiene, typically in the form of a solid bar or a liquid, that helps to remove dirt, oils, and germs from the skin.
  6. 9. A tool used for removing pencil or graphite marks from paper by abrasion. Typically made of rubber or a similar material.
  7. 11. bomb A highly destructive weapon that relies on nuclear reactions to release an immense amount of energy in the form of an explosion.