Across
- 3. Element in Earth's atmosphere.
- 4. Earth's structure study.
- 9. Carnivorous hunter.
- 10. Sun's visible surface.
- 11. Molten rock eruption.
- 13. Inheritance study.
- 17. CO2 gas.
- 20. Uncharged atomic particle.
- 21. Powerful tropical cyclone.
- 23. Ecosystem study.
- 24. Seasonal animal movement.
- 27. Disorder increase principle.
- 28. Pine or fir tree.
- 29. Pollutant precipitation.
- 31. Passing traits from parents.
- 33. Violently rotating wind funnel.
- 34. Ocean-dwelling flower.
- 35. Element's identifier.
- 39. Microscopic infectious agent.
- 41. Interconnected living environment.
- 43. Microscopic single-celled organisms.
- 44. Cell's specialized unit.
- 45. Air envelope around Earth.
- 48. Green plant pigment.
- 50. Variety of species.
- 52. Metal oxidation.
- 54. Supercontinent.
- 56. Darwin's survival principle.
- 58. Gas to liquid change.
- 60. Caterpillar to butterfly change.
- 61. Meat-eating animal.
- 62. Study of celestial bodies.
- 63. Space cloud of gas and dust.
- 64. Water-based environment.
Down
- 1. Object's resistance to change.
- 2. Exploding star.
- 5. Flowing charge.
- 6. Sunlight-powered plant process.
- 7. Study of matter and energy.
- 8. Space rock.
- 12. Essential gas for life.
- 14. Large tusked mammal.
- 15. Atom's pull on electrons.
- 16. Attraction and repulsion force.
- 18. Pouched mammal.
- 19. Immunity-building shot.
- 22. Chemical responsiveness.
- 25. Plant fertilization process.
- 26. Water-to-land vertebrate.
- 30. Earthquake strength measure.
- 32. Ground-shaking event.
- 36. Acid-base reaction balance.
- 37. Basic atomic substance.
- 38. Milky Way is one.
- 40. Plant water transport tissue.
- 42. Close species interaction.
- 46. Cell division process.
- 47. Organism multiplication.
- 49. Plant-eating animal.
- 51. Living entity.
- 52. Tropical storm system.
- 53. Smallest compound unit.
- 55. Molds and mushrooms.
- 57. Light in deep-sea creatures.
- 59. Star system group.