Friday Crossword

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Across
  1. 5. an element needed for breathing
  2. 6. a pure substance whose molecules contain different atoms from different elements
  3. 9. the region of Texas we live in
  4. 11. to identify or describe clearly
  5. 12. the coast in the south east of Texas
  6. 15. a river that creates the border with Oklahoma
  7. 17. a type of chemical reaction that breaks molecules into separate elements
  8. 18. one type of organism
  9. 19. related to one kind of thing
  10. 20. the base for all life, and half of CO2
  11. 22. the most abundant element in the atmosphere
  12. 25. the most populous city in Texas
  13. 26. homogeneous mixtures of more than one susbtance
  14. 27. texas's capital
  15. 28. the second most populous Texan city
  16. 29. a particular subject about which a person is an expert
Down
  1. 1. the state along the eastern Texas border
  2. 2. this is formed when compounds are physically combined without changing their properties
  3. 3. a national park in west Texas
  4. 4. something made up of two or more atoms bonded tightly together
  5. 7. a person with special knowledge in a particular area
  6. 8. a region famous for caverns and lakes
  7. 10. the western most city in Texas
  8. 13. the condition of easy recognition or close relationship
  9. 14. well known
  10. 16. the name of the princess from our literature
  11. 18. the type of chemical reaction used in photosynthesis
  12. 20. a type of chemical reaction that is used when you burn rocket fuel
  13. 21. to get to know
  14. 23. a river along Texas's southern border
  15. 24. where the stars are big and bright