Vowel Alternation: Long to Short

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Across
  1. 5. Exact and accurate in detail.
  2. 6. The act of starting a fire or a car engine.
  3. 9. A feeling of thankfulness or appreciation.
  4. 10. A source of valuable materials or minerals beneath the earth's surface.
  5. 12. To take air into the lungs and release it.
  6. 16. The air taken in or expelled from the lungs.
  7. 17. A person who has committed a crime.
  8. 18. The process of reviewing and improving something.
  9. 19. The quality of being exact and accurate.
Down
  1. 1. Feeling or showing thankfulness.
  2. 2. To make changes to improve or update something.
  3. 3. A person skilled in sports or physical activities.
  4. 4. To set something on fire or start burning.
  5. 7. Existing in or caused by nature; not artificial.
  6. 8. The physical world, including plants, animals, and landscapes.
  7. 11. Relating to a whole country or nation.
  8. 13. Physically strong, fit, and active.
  9. 14. A large group of people united by shared culture or government.
  10. 15. A naturally occurring solid substance formed in the earth.
  11. 17. An act that breaks the law.