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Across
- 2. Force attracting objects to Earth
- 4. Group of similar living organisms
- 5. A word related to science
- 8. One body blocking another in space
- 10. Large molecule essential for life
- 11. Preserved remains of ancient life
Down
- 1. A word related to science
- 3. A word related to science
- 6. Biological catalyst for reactions
- 7. Pure substance on periodic table
- 9. Solid with ordered atomic structure