1. volcano- a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
2. magma- molten material beneath or within the earth's crust, from which igneous rock is formed
3. lava- the molten, fluid rock that issues from a volcano or volcanic vent.
4. Ring of Fire- the linear zone of seismic and volcanic activity that coincides in general with the margins of the Pacific Plate.
5. hot spot- any area or place of known danger, intrigue, dissension, or instability
6. magma chamber- a reservoir of magma in the earth's crust where the magma may reside temporarily on its way from the upper mantle to the earth's surface
7. pipe- an eruptive passageway opening into the crater of a volcano
8. vent- an opening at the earth's surface from which volcanic material, as lava, steam, or gas, is emitted
9. lava flow- a mass of flowing or solidified lava
10. crater-the cup-shaped depression or cavity on the surface of the earth or other heavenly body marking the orifice of a volcano.
11. tectonic plates- the dozen or so plates that make up the surface of the earth. Their motion is studied in the field of plate tectonics, this may cause continental drifts, earthquakes, volcanoes, mountains, and ocean trenches
2. magma- molten material beneath or within the earth's crust, from which igneous rock is formed
3. lava- the molten, fluid rock that issues from a volcano or volcanic vent.
4. Ring of Fire- the linear zone of seismic and volcanic activity that coincides in general with the margins of the Pacific Plate.
5. hot spot- any area or place of known danger, intrigue, dissension, or instability
6. magma chamber- a reservoir of magma in the earth's crust where the magma may reside temporarily on its way from the upper mantle to the earth's surface
7. pipe- an eruptive passageway opening into the crater of a volcano
8. vent- an opening at the earth's surface from which volcanic material, as lava, steam, or gas, is emitted
9. lava flow- a mass of flowing or solidified lava
10. crater-the cup-shaped depression or cavity on the surface of the earth or other heavenly body marking the orifice of a volcano.
11. tectonic plates- the dozen or so plates that make up the surface of the earth. Their motion is studied in the field of plate tectonics, this may cause continental drifts, earthquakes, volcanoes, mountains, and ocean trenches