| Term | Definition |
|---|
| lava flows | Rivers of red hot lava. |
| magma | Hot liquid that is created deep underground beneath the earth's crust. |
| vents | Holes where magma comes to the earth's surface. |
| pyroclastic material | Magma and pieces of rock that fly through the air in a wreck of destruction during a violent eplosive eruption. |
| volcano | A build-up of pyroclastic material or magma on earth's surface. |
| water | This thirst-quinching natural liquid causes eruptions to be more explosive. |
| silica | This mineral block causes eruptions to be more violent the more it has of it. |
| volcanic blocks | Large pieces of pyroclastic material that is made up of rock. |
| blocky lava | a cool stiff lava that can't move very far from the vent. |
| pahoehoe | A type of lava that is slow-moving, and is like wax. It resembles rope. |
| Aa | A brittle stiff lava. |
| volcanic bombs | Blobs of magma that harden in the air. |
| lava | magma that has been exposed to oxygen. |
| pillow lava | Lava that forms during underwater eruptions. |
| lapilli | Pebble sized bits of pyroclastic material that vary between 2 and 64mm in diameter. |
| volcanic ash | Forms when stiff magma quickly expands. Is less than 2mm in diameter. |
| shield volcanoes | Built out of layers on runny, non-explosive lava. They are large and non-explosive. |
| cinder cone volcano | A volcanic cone created entirely from pyroclastic material. They are small and explosive. |
| composite volcanoes | They are built out of pyroclastic material and layers of runny non-explosive lava. Are sometimes explosive, and sometimes aren't. |
| stratovolcano | Another name for composite volcano. |
| crater | A funnel shaped pit and the main vent or a volcano. |
| caldera | Forms when a magma chamber empties, and the ground above it falls in, creating a large, sinking depression. |
| fissures | Large cracks in the earth's crust. |
| lava plateaus | They form similarly to sheild volcanoes; built out of layers of runny, non-explosive lava. They aren't volcanoes. |
| Mauna Kea | An example of a shield volcano. |
| Paricutin | An example of a cinder cone volcano. |
| Mount Fuji | An example of a composite volcano. |
| extinct volcano | A volcano that hasn't erupted in recorded history and most likely will never erupt again. |
| dormant volcano | A volcano that doesn't show signs of erupting but has erupted in recorded history. |
| active volcano | A volcano that shows signs of erupting. |
| seismograph | An instrument that measures earthquakes. If many earthquakes that are small occur in a reletively short amount of time around a volcano, it may mean that the volcano is going to erupt soon. |
| tiltmeter | An intrument that measures the difference of the sope of a volcano that can change, leading scientists to believe whether or not it will erupt. It isn't 100% accurate. |
| rift | A deep crack. |
| hot spots | When tecontic plates meet directly below a mantle plume, it forms these. |
| mantle plumes | columns of rising magma. |
| false | TRUE OR FALSE: A rift and a fissure are the same thing. |
| false | TRUE OR FALSE: A caldera is smaller than a crater. |
| false | TRUE OR FALSE: A caldera and a crater are formed similarly. |
| true | TRUE OR FALSE: A caldera is much larger than a crater. |
| true | TRUE OR FALSE: Aa is a stiff, brittle lava. |
| true | TRUE OR FALSE: The more silica, the larger the eruption. |
| false | TRUE OR FALSE: The less water, the larger the explosion. |
| false | TRUE OR FALSE: A stratovolcano is another name for shield volcano. |
| true | TRUE OR FALSE: A stratovolcano is another name for a composite volcano. |
| true | TRUE OR FALSE: A stratovolcano is not a cinder cone volcano. |
| false | TRUE OR FALSE: Cinder cone volcanoes are most often the biggest type of volcano. |
| cinder cone volcano | CHARACTERISTICS: A small, explosive volcano that is made entirely from pyroclastic material. |
| shield volcano | CHARACTERISTICS: A gigantic, non explosive volcano made from repeated layers of non-explosive lava. |
| composite volcano | CHARACTERISTICS: A combination completely of the other 2 types of volcanoes, forms by both repeated layers of runny lava and by pyroclastic material, its' size can vary, and can be both explosive and non-explosive. |
| divergent boundary | GOOD TO KNOW: This boundary almost always forms a non-explosive volcano. |
| convergent boundary | GOOD TO KNOW: This boundary usually forms explosive volcanoes. |
Combine with other sets
u guys aren't noce
