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Across 1. Major ingredient of magma. 2. The huge hole left by the collapse of a volcanic mountain. 4. A long tupe that connects the magma chamber to Earth's surface. 7. A tall cone-shaped mountain that forms when layers of lava and layers of ash build up on eachother 11. A string of volcanically created islands. 12. Any property that produces a change in the composition of matter. 14. ________________________ occurs when an ecplosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs. 20. When magma heats underground water. 23. The resistance of a liquid to flow. 25. Forms when magma squeezes through horizontal layers of rock and hardens. 26. The bowl-shaped area that may form at the top of a volcano. 27. Forms when magma forces itself across rock layers and hardens. 28. Lava befor it reaches the surface 29. A fountain of water and steam that erupts from the ground 30. A ___________ volcano is one that is expected to awaken in the future and become active

Down 3. A ring of volcanos around the Pacific Ocean 5. Any characteristic of a substance that can be observed or measured without changing the composition of the substance. 6. A steep cone-shaped hill or small mountain. 8. Magma after it reaches the surface 9. A mountain or hill that erupts lava and gasses. 10. A substance mad of two or more elements that have been chemically combined. 13. A wide gently sloping volcanic mountain. 14. Fast moving hot lava that has low viscosity. 15. A pocket of magma beneath a volcano. 16. Forms when magma hardens in a volcano's pipe. 17. A mass of rock that forms when a large body of magma cools inside the crust. 18. A substance that cannot be broken down into other substances. 19. An ____________ volcano is one that is unlikely to erupt again. 21. A ______________ is the area covered by lava as it pours out of the volcano. 22. An area where material from deep within the mantle rises and melts forming magma. 23. Molten rock and gas leave the volcano through an opening called a ________ 24. High viscosity lava