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Mr. Lenz's Review
Mr. Lenz's Vocabulary Review Ch. 6F all - Volcanoes
| Question | Answer |
|---|---|
| A vent or fissure in the Earth's surface through which magma and gases are expelled | Volcano |
| The body of molten rock that feeds a volcano | Magma chamber |
| An opening at the surface of the Earth through which volcanic material passes | Vent |
| A funnel shaped pit near the top of a the central vent of a volcano | Crater |
| A large, circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink | Caldera |
| A wide, flat landform that results from repeated nonexplosive eruptions of lava that spread over a large area | Lava Plateau |
| An area of deep cracks that forms between two tectonic plates that are pulling away from each other | Rift zone |
| A volcanically active area of Earth's surface far from a tectonic plate boundary | Hot Spot |
| Lava that pours out quickly and forms a brittle, jagged crust | Aa |
| Thick lava that flows slowly and has a glassy surface with rope-like wrinkles | Pahoehoe |
| Forms when lava erupts underwater | Pillow lava |
| Cool, stiff lava that oozes out slowly from a vent form a crust with many sharp-edged chunks | Blocky lava |
| Large blobs of magma that harden in the air. | Volcanic bombs |
| Pieces of solid rock erupted from a volcano | Volcanic blocks |
| pebblelike bits of magma that harden before they hit the ground. Italian for "little stones" | Lapilli |
| Pyroclastic material formed as gas bubbles in magma explode into tiny glasslike slivers. | Volcanic ash |
| Enormous amounts of hot ash, dust and gases are ejected from a volcano that races downhill at great speeds. | Pyroclastic flow |
| Molten rock that flows to the Earth's surface | Lava |
| Molten rock before it reaches the Earth's surface | Magma |
| forms when magma is blasted into the air and hardens | Pyroclastic material |
| A volcano built from layers of lava released from many nonexplosive eruptions | Shield volcano |
| A volcano made from pyroclastic materials from mildly explosive eruptions | Cinder cone volcano |
| A volcano that forms from explosive eruptions followed by quiet lava flows | Composite volcano |
| The most common type of volcano also called a stratovolcano | Composite volcano |
| A volcano that has gently sloping sides | Shield volcano |
| Long cracks in the Earth's crust from which lava flows to form lava plateaus | Rifts |
Created by:
lenzt
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