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