GED Vocabulary Crossword Puzzle

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Across
  1. 4. purpose or mathematical symbol
  2. 5. get from something
  3. 7. recognize
  4. 10. length of time
  5. 15. of importance
  6. 16. unchanging
  7. 18. carefully examine
  8. 19. element or component
Down
  1. 1. rule for doing something
  2. 2. a generalization or notion
  3. 3. procedure
  4. 6. to show
  5. 8. a math symbol
  6. 9. explanation
  7. 11. proof
  8. 12. information or facts
  9. 13. best guess
  10. 14. spread over an area
  11. 17. a hypothesis