Volcano Crossword

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