Science and Nature

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