Across
- 3. A crack in the Earth's surface where lava can escape (4)
- 6. Another word for underground molten rock (5)
- 8. A sudden shaking of the ground (10)
- 9. Tectonic ...... This is a big of Earth's crust that moves slowly (5)
- 10. A volcano that will not erupt again (7)
- 11. Invisible material that escapes with lava (3)
- 13. Sudden explosion from a volcano (8)
Down
- 1. A dark hard rock that cools from lava (6)
- 2. Hot gas and ash cloud from an eruption (5)
- 3. The study of volcanoes (11)
- 4. The top opening of a volcano (6)
- 5. Hot molten rock that flows from a volcano (4)
- 7. Small pieces of rock thrown into the air during an eruption (3)
- 9. The strong force that pushed magma up from inside the Earth (8)
- 12. The very centre of the Earth (4)