Science and Nature
Across
- 1. Largest planet in the solar system
- 6. Earth's closest star
- 9. Chemical symbol for gold
- 11. Process of evolution
- 13. Study of living organisms
- 15. Unit of measurement for energy
- 17. Building blocks of matter
- 19. Compound essential for life
- 20. Process of converting sunlight into energy
Down
- 2. Electrically charged particle
- 3. Study of celestial bodies
- 4. Particle smaller than an atom
- 5. Force that attracts objects
- 7. Outer layer of the Earth
- 8. Body's control center
- 10. Study of the Earth's atmosphere
- 12. Source of Earth's heat
- 14. Protective layer in the atmosphere
- 16. Natural disaster caused by tectonic plates
- 18. Earth's natural satellite