Across
- 1. The release of a substance as gas
- 7. Earth's rocky shell
- 8. Plates seperating
- 10. Earth's second layer
- 11. All the worlds oceans as one big ocean
- 12. A theroy explaining the structure of earths crust
- 14. Plates sliding past one another
- 18. Totality of everything that we know exists
- 19. A massive, gravitationally bound system consisting of a million stars
- 20. All land
Down
- 2. the collection of eight planets and their moons
- 3. A cloud of dust and gas in outer space
- 4. A star that greatly in brightness because of a catastrophic explosion
- 5. Plates moving towards each other
- 6. a celestial body moving in an elliptical orbit around a star
- 9. The production of complex molecules within living organisms or cells
- 13. Earth's inner most layer
- 15. A fixed luminous point in the night sky
- 16. The galaxy of which the sun and solar system are a part of
- 17. The branch of science that deals with the physical and biological properties of the sea