Across
- 3. American, Industrial or one year
- 6. Rocks with fossils
- 7. Biggest planet, greatest god
- 9. Ours is "milky"
- 15. Diamond, for example; or talc
- 16. The end of a species
- 17. Wall of water made by earthquakes
- 18. Transformed by heat and pressure
- 20. Mars has two, Venus none
- 21. Roman god of war
- 22. Rocks made of magma
Down
- 1. Rocky, warm, small
- 2. Planets of many moons, rings, gas
- 4. Study of how Earth's plates move
- 5. The "happy" part of an atom
- 8. Bad stuff on land, air and sea
- 10. Symbol of Mott Hall
- 11. The study of objects beyond Earth
- 12. The longest day
- 13. Gases that keep Earth warm, like CO2
- 14. Outer rock belt
- 19. Spinning in astronomy