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11
Across
- 3. Solid with ordered atomic structure
- 6. Force attracting objects to Earth
- 8. Device for controlled nuclear reactions
- 9. Uncharged particle in nucleus
- 10. Slow-moving river of ice
- 11. Fourth state of matter
Down
- 1. Substance providing immunity
- 2. Wearing away of land by water or wind
- 4. A word related to science
- 5. Positively charged particle
- 7. Preserved remains of ancient life