Across
- 3. made from heat and melting
- 5. simplest form of matter
- 7. terrestrial object orbiting a star
- 9. time to orbit the sun
- 12. largest block of time
- 13. emission of hi energy particles
- 15. naturally occurring crystalline solid
- 16. movement of material due to temperature
- 19. relating to the moon
- 22. indicating relative rock age
- 24. large sheets of flowing ice
- 25. to advance
Down
- 1. separates one basin from the another
- 2. average weather
- 4. bottom of the sea
- 6. representation of an object or system
- 8. rock formation rising high
- 10. divisions of eons
- 11. completely died out
- 14. solid mixture of minerals
- 17. rocky outer layer of earth
- 18. mountain building event
- 20. to recede
- 21. thermal energy
- 23. divisions of eras