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Across
- 2. Mixture producing intense heat
- 3. Wearing away of land by water or wind
- 6. Substance providing immunity
- 8. Device for controlled nuclear reactions
- 9. Biological catalyst for reactions
Down
- 1. Solid with ordered atomic structure
- 3. Pure substance on periodic table
- 4. Uncharged particle in nucleus
- 5. Force attracting objects to Earth
- 7. Group of similar living organisms