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Ch 12 Volcanoes
| Question | Answer |
|---|---|
| An opening in the Earth that erupts gases, ash, and lava | Volcano |
| Devils Tower in Wyoming is an example of a volcanic | Neck |
| An active volcano in Hawaii is | Kilauea |
| Ash, heat, and acid rain were present when this volcano errupted in Montserrat | Soufriere Hills |
| Magma forms deep inside the Earth because of | a rise in temperature and a drop in pressure |
| Two factors that determine whether a volcanic erruption will be quiet or explosive are | The amount of water vapor and other gases trapped in the magma and the amount of silica in the magma |
| If, after an eruption , the top of a volcano collapses down a _______ forms. | caldera |
| Balsaltic magma produces _________ eruptions | nonexplosive |
| An example of a volcano that has nonexplosive eruptions is | Kilauea in Hawaii |
| The steep-walled depression around a volcano's vent is a | crater |
| A cinder cone volcano that is in Mexico is | Paricutin |
| An opening that lava flows from onto the Earth's surface | vent |
| An area between the Earth's mantle and core that is unusually hot and produced the Hawaiian Islands | hot spot |
| Magma that is ____ in silica produces nonexplosive volcanoes | low |
| Bits or rock or solidified lava dropped from the air | tephra |
| This type of volcano has quiet eruptions, the lava flows in flat layers with gently sloping sides | shield volcano |
| This type of volcano has explosive eruptions that throws tephra high into the air forming a steep sided loosely packed volcano | cinder cone volcano |
| In this type of volcano the eruptions vary between explosive and quiet. It has alternating layers of lava flows and tephra | composite volcano |
| An intrusive rock feature that forms when magma bodies are forced upward, but cool slowly under the surface | batholith |
| Magma that is forced into a crack parallel to rock layers and hardens | sill |
| Magma that is forced into a vertical crack between rock layers and hardens | dike |
| Most igneous activity takes place | Underground |
| Cinder Cone volcanoes produce______ eruptions | explosive |
| Shield volcanoes produce_______eruptions | quiet |
| Composite volcanoes produce _______and _______ eruptions | quiet and explosive |
Created by:
cmorrow1
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