Reading & Vocab Focus 1 U5 PartA

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Across
  1. 2. find or learn sth. new
  2. 4. have inside
  3. 6. detailed
  4. 8. as a result
  5. 11. whem contrasted with
  6. 15. sharply
  7. 16. many years in the past
  8. 18. small animals with six legs, a hard body and often wings
  9. 19. N2
  10. 20. green things that get energy from sunlight
  11. 21. the hard material inside trees
Down
  1. 1. below 0 degrees Celcius
  2. 3. rock
  3. 5. water that has turned solid
  4. 7. move ahead to
  5. 8. normal
  6. 9. very big
  7. 10. a substance used in or produced by a chemical process
  8. 12. O2
  9. 13. the past participle of 'to freeze'
  10. 14. extinct reptiles that were often very, very large
  11. 17. understand