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