You can do this

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Across
  1. 1. someone who helps others or something that makes things easier
  2. 4. bad condition does not look good or broken
  3. 5. look after or maintain
  4. 7. someone who finds new places
  5. 10. someone who designs and builds buildings, bridges, engines and machines
  6. 11. not known to everyone
  7. 12. opposite of light
Down
  1. 2. scanner produces 3d images to measure a space
  2. 3. something new that someone created
  3. 5. a monumental structure with a square or triangular base and sloping sides that meet in a point at the top, especially one built of stone as a royal tomb in ancient Egypt.
  4. 6. not shallow/low
  5. 8. write down or document or in video format
  6. 9. events that happened in the past