Across
- 5. Term used to describe a volcano that is no longer active and unlikely to erupt again.
- 7. The molten mixture of rock-forming substances, gases, and water from the mantle.
- 9. A long tube through which magma moves from the magma chamber to Earth’s surface.
- 10. An area where magma from deep within the mantle melts through the crust above it.
- 13. The area covered by lava as it pours out of a volcano's’ vent.
- 15. A string of volcanoes that form as the result of subduction of one oceanic plate beneath a second oceanic plate.
- 16. A deposit of hardened magma in a volcano’s pipe.
- 18. A mass of rock formed when a large body of magma cools inside the crust.
- 21. The flow of ash, cinders, bombs, and gases down the side of a volcano during an explosive eruption.
- 22. The large hole at the top of a volcano formed when the roof of a volcano’s magma chamber collapses.
- 23. A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano’s opening.
Down
- 1. Not currently active but able to become active in the future (as with a volcano).
- 2. The opening through which molten rock and gas leave a volcano.
- 3. A material found in magma that is formed from the elements oxygen and silicon; it is the primary substance of Earth’s crust and mantle.
- 4. A slab of volcanic rock formed when magma forces itself across rock layers.
- 6. A tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials.
- 8. A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions.
- 11. The pocket beneath a volcano where magma collects.
- 12. A major belt of volcanoes that rims the Pacific Ocean.
- 14. Liquid magma that reaches the surface.
- 17. A weak spot in the crust where magma has come to the surface.
- 19. A slab of volcanic rock formed when magma squeezes between layers of rock.
- 20. A bowl-shaped area that forms around a volcano’s central opening.