Across
- 3. "The visible surface layer of the sun."
- 7. "A technique that uses electric current to drive chemical reactions."
- 8. "The process of change in rocks due to heat, pressure, or chemical reactions."
- 10. "A device for measuring properties of light over a specific portion of the spectrum."
- 13. "A method to stimulate immunity against specific diseases."
- 16. "Atoms of the same element with different numbers of neutrons."
- 18. "The rigid outer layer of Earth, including the crust and upper mantle."
- 19. "A very bright and distant active galactic nucleus."
- 20. "The production of light by living organisms, like fireflies."
Down
- 1. "A device that uses rotation to separate substances of different densities."
- 2. "The chemical process that combines small molecules into long chains."
- 4. "A measure of disorder or randomness in a system."
- 5. "A type of electromagnetic radiation with wavelengths shorter than visible light."
- 6. "A planet located outside our solar system."
- 9. "An instrument used to detect radiation."
- 11. "The green pigment in plants that captures sunlight for photosynthesis."
- 12. "The study of Earth’s crust movements and their effects, like earthquakes."
- 14. "The science of designing and building aircraft."
- 15. "A large ecosystem characterized by specific climate and species."
- 17. "The process where a substance changes from solid to gas without becoming liquid."