Across
- 4. rapid expansion formation of universe
- 7. layer of earth that is liquid
- 9. a pattern of lines showing composition of stars
- 11. accepted idea of moon's formation
- 14. earth earth layer has different function
- 16. how we know of the earth's layers
- 17. not much gas, too hot
- 18. gas and dust sticking together forming planets
- 19. cloud of gas and dust
Down
- 1. cold allowing for gas to condense
- 2. brittle outer mechanical layer
- 3. moon is very similar to this layer of earth
- 5. spectal lines shifting showing moving away
- 6. caused our nebula to swirl
- 8. earth's crust made of metals
- 10. core made up of this
- 12. area where earthquake waves speed up
- 13. each earth layer made of different things
- 15. earth's crust made of granite