VOCABULARY

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Across
  1. 2. something that takes the place of another
  2. 4. abstract ideas or theories
  3. 7. widespread, common, or overall
  4. 9. significant discoveries or advancements
  5. 11. currently present or in existence
  6. 12. based on testing or trial and error
  7. 13. handle or control, often with the intention of organizing or supervising
  8. 15. societies with advanced culture, technology, and organization
Down
  1. 1. a guide or instructions provided in a book or document
  2. 3. followed or obeyed, usually rules or instructions
  3. 5. extended or distributed over an area
  4. 6. creative and innovative
  5. 8. the act of staying alive or continuing to exist
  6. 10. looking for or searching for something
  7. 14. created by human effort, not natural