Across
- 4. Evidence that galaxies are drifting apart
- 5. Object in space made of rock and ice
- 7. Plates move together
- 9. Cloud of gas and dust in space
- 11. Long term weather conditions of a region
- 14. Law of relative dating that states older rocks are on the bottom
- 17. Large glowing ball of gas that generates nuclear fusion in the core
- 18. Theory that continents were once all connected and split apart
- 20. Middle layer of the sun's atmosphere
- 21. Breaking down of rock
- 23. Supercontinent
- 25. Group of stars
- 27. Rock that forms from magma
- 28. Enormous explosion of a star
Down
- 1. Plates move apart
- 2. Conditions of the atmosphere at a particular place and time
- 3. Outermost layer of the sun's atmosphere that extends into space
- 6. Rock that has been changed by temperature and pressure
- 8. Rock that is compacted and cemented together
- 10. Theory of how the universe was created
- 12. Visible surface of the sun
- 13. Process that occurs in the core of a star
- 14. Process by which new oceanic crust is created at mid-ocean ridges
- 15. Process by which crust sinks into the mantle beneath another piece of crust
- 16. Part of the engineering cycle that takes place after a prototype is built
- 19. Age of a rock determined by comparison with other rocks
- 22. Plates that slide past one another
- 24. The exact age of a rock determined using radioactive decay
- 26. Rock in space between Mars and Jupiter