Across
- 1. invented by Nobel
- 4. things that get in the way
- 7. use of scientific knowledge to solve
- 8. balanced or steady
- 10. closed tightly to stop anything from going through
- 11. fall apart or fall down
Down
- 2. residual left after an explosion
- 3. able to make a hole with spinning motion
- 5. people that design and build things
- 6. substances that can blow up
- 9. a long ditch