Across
- 6. is a volcano that is unlikely to ever erupt again
- 8. is the spread of lava as it pours out of a vent
- 11. a long tube that extends from Earth's crust up through the top of volcano, connecting the magma chamber to Earth's surface
- 12. is a material found in magma that forms from the elements oxygen and silicon
- 13. when magma reaches the surface
- 14. are tall, cone-shaped mountains in which layers of lava alternate with layers of ash
Down
- 1. sleeping volcano that scientists expect to awaken in the future and become active
- 2. molten rock and gas leave the volcano through an opening
- 3. is a bowl-shaped area that may form at the top of a volcano around the central vent.
- 4. is the hole left when a volcano collapses
- 5. is a mass of rock formed when a large body of magma cools inside the crust
- 7. is a mountain that forms in Earth's crust when molten material, or magma, reaches the surface
- 9. is a molten mixture of rock-forming substances, gases, and water from the mantle.
- 10. magma that forces itself across rock layers hardens into...
- 15. magma that squeezes between horizontal layers hardens to form a ...