Across
- 1. tiny pieces of dirt or other matter in the air
- 4. providing extra help or support
- 5. a surface that separates areas in a building
- 7. to make the air, water, or land dirty and harmful
- 9. a device used to control nuclear reactions
- 11. energy that comes from a source and travels through space
- 13. a device that helps to transfer heat or energy from one place to another
- 14. hot vapor that forms when water is heated
- 15. to take something to a person or place
Down
- 2. relating to an engine with a fan that spins very fast
- 3. a substance that is burned to provide heat or power
- 6. being present at an event or meeting
- 7. people who work for a company or organization
- 8. a single thing or person
- 10. relating to the energy produced by splitting atoms
- 12. a protective covering