Black isn't just a colour - Crossword

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Across
  1. 8. The invention of the steam engine was a _____________ step in industrial development.
  2. 10. spalten, polarisieren
  3. 11. loud noise, e.g made when sth. (a vase, a glass) falls down
  4. 13. Our teacher will __________ us a bunch of work when she isn't there in June.
  5. 14. consisting of many different cultures and kinds of people
  6. 15. Kluft, Abgrund
Down
  1. 1. to win back
  2. 2. The ______ between black and white people in the United States is big.
  3. 3. The king told his soldiers to put the thief into the dark _______
  4. 4. being strong and not easily to destroy
  5. 5. e.g. when a country doesn't have enough food to offer a ______ is announced
  6. 6. exhausting (synonym)
  7. 7. gähnen, klaffen
  8. 9. time afterwards
  9. 12. As an _______ she looks at texts and tries to find out the purpose and other background information.