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Across
- 1. Biological catalyst for reactions
- 2. Preserved remains of ancient life
- 6. Device for controlled nuclear reactions
- 8. Large molecule essential for life
- 9. Solid with ordered atomic structure
Down
- 1. Pure substance on periodic table
- 3. A word related to science
- 4. Fourth state of matter
- 5. Force attracting objects to Earth
- 7. Diffusion of water through a membrane