Across
- 3. a minerals ability to split easily on a flat surface
- 4. a volcano that is currently erupting
- 7. all the water on the earth
- 9. bowl-shaped area at the top of a volcano
- 11. plates moving away from each other
- 12. the way a mineral reflects light
- 13. outermost layer of the earth
- 15. molten rock underneath the Earth's surface
Down
- 1. an opening in a volcano
- 2. study of the earth
- 5. plates moving together
- 6. a rock that forms from great heat and pressure
- 8. occurs when another plate moves under another
- 10. a volcano that isn't expected to erupt
- 14. color of a mineral when ground into powder