SPELLING!!!

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Across
  1. 4. Things that make up everything in the world
  2. 6. Rhymes with lemperance
  3. 7. A plan
  4. 9. The interactions of substances
  5. 12. What happens when you add a chemical and a chemical
  6. 13. To be thankful for something
  7. 15. The study of everything
  8. 16. Doing things on your own
  9. 20. Asking questions and wondering
Down
  1. 1. An element that is subject to change
  2. 2. Helps you think
  3. 3. Existence or experience beyond the normal or physical level
  4. 5. A math strategy
  5. 7. A person who studies science
  6. 8. A thing
  7. 10. Something we do when we stop being angry at someone
  8. 11. Everything
  9. 14. Also known as grit
  10. 17. The study of life
  11. 18. Something you can touch
  12. 19. The opposite of a solid