Greek word parts

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Across
  1. 4. Instrument for measuring temperature
  2. 5. Self-activating
  3. 6. Government system where member are elected
  4. 8. Supporting democracy
  5. 10. Asking for forgiveness
  6. 16. Relating to heat
  7. 17. Machines and other devices
  8. 18. Study of rocks, what makes up earth
  9. 19. Study of small organisms
Down
  1. 1. Another word for car
  2. 2. Order of events and dates
  3. 3. Math of point, lines, figures, shapes
  4. 5. High class
  5. 7. Person from the upper/high class
  6. 9. Study of the mind and behavior
  7. 11. Study of Earth's features and atmosphere
  8. 12. Collection of poems, short stories
  9. 13. Stories about a culture or religious beliefs
  10. 14. Container for keeping food cool or warm
  11. 15. Device that regulates temperature