| Term | Definition |
|---|
| Volcanic Necks (plugs) | It looks like a giant tooth stuck in the ground. |
| Volcanic Necks (plugs) | Forms when magma hardens in a volcano's pipe |
| Volcanic Dikes | Vertical columns of solid magma |
| Volcanic Dikes | when magma forces itself across rock layers and hardens. |
| Volcanic Sills | Horizontal layers of solid magma |
| Volcanic Sills | Formed when magma squeezes between layers of rocks |
| Batholith | large rock masses that can form mountain ranges due to uplifting |
| Batholith | a mass of rock formed when a large body of magma cools inside the crust |
| Dome Mountains | Land that is bent upward in a dome shape |
| Dome Mountains | forms when rising magma is blocked by horizontal layers of rock, the magma forces the layers of rock to bend upward into a dome shape |
| Shield volcanoes | a gently sloping mountain |
| Shield volcanoes | formed when thin layers of lava pour out of a vent and harden on top of other layers building |
| Cinder cone volcanoes | a steep, cone-shaped hill or mountain |
| Cinder cone volcanoes | formed when a volcano produces ash, cinders and bombs which pile up around the vent in a steep pile |
| Composite volcanoes | tall, cone-shaped mountains |
| Composite volcanoes | formed from alternating layer of lava and ash |
| Lava plateaus | high, level areas |
| Lava plateaus | formed when lava flows out of several long cracks in an area over a long distance before cooling and solidifying; after occurring over and over, a plateau is formed |
| Calderas | a huge hole |
| Calderas | left by the collapse of a volcano formed from enormous eruptions that empty the vent and magma chamber under the volcano, then hole is filled with pieces of the volcano as it falls inward, lava and ash |
| Lava | One danger of quiet eruptions is ___ flows. |
| pyroclastic | One danger of explosive eruptions is ___ flows. |
| geothermal | Water heated by magma can produce ___ energy. |
| hot spring | When ground water is heated by a nearby magma chamber |
| geyser | When groundwater heated by magma sprays with great pressure |
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