Across
- 2. Stable hydrogen isotope
- 4. document written by hand
- 5. a device which uses a powerful magnetic field to confine plasma
- 6. making or intended to make a profit
- 8. The way our sun generates its energy
- 12. rapid increase in the number or amount of something
- 13. an instruction, command, or role given to a person or group.
Down
- 1. a development or improvement
- 3. a donut in geometry
- 7. (of a fact or circumstance) be a powerful or conclusive factor in preventing
- 9. International Thermonuclear Experimental Reactor
- 10. the line at which the earth's surface and the sky appear to meet
- 11. The way nuclear plants generate there energy