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Across
- 2. Solid with ordered atomic structure
- 4. Large molecule essential for life
- 7. Wearing away of land by water or wind
- 8. Biological catalyst for reactions
- 10. A word related to science
- 11. Center of an atom or cell
- 12. A word related to science
Down
- 1. Positively charged particle
- 3. Group of similar living organisms
- 4. Fourth state of matter
- 5. A word related to science
- 6. Naturally occurring inorganic solid
- 9. Uncharged particle in nucleus