Module 7 Week 2

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Across
  1. 3. gas that comes out of an engine as a waste product
  2. 4. valuable
  3. 5. scientific study of matter
  4. 7. artificial or not natural
  5. 9. people in charge
  6. 10. cruel and showing no concern for others
  7. 11. caught on fire or exploded
Down
  1. 1. damaged an area while looking for something
  2. 2. outer edges of a city far away from the center
  3. 6. organization with a focus or goal
  4. 8. made up of two or more different things