Across
- 3. a hard, dark, glasslike volcanic rock
- 4. caused by a explosion or impact
- 5. hot molten
- 7. coming closer together
- 8. an act or instance of erupting
Down
- 1. moving or extending in different directions
- 2. hot fluid or semifluid material below or within the Earth's core
- 6. a powder residue left after a burning substance