VOLCANOES

Explore volcanoes! Label parts, match terms, and learn eruption types.

Label the picture of a volcano using the following terms1. crater2. ash cloud3. magma chamber4. main Vent or pipe5. secondary vent You must spell the word correctly and write your answer exactly like they are listed above. No capitals all lower case. ash cloud crater main vent or pipe secondary vent magma chamber Match the terms in column A to their correct definitions in column B Volcano A crack or hole in the earth's surface that allows magma, ash, gas or steam to escape to the surface. Magma Molten (melted) rock under the crust. Lava Molten rock on the surface of the earth. Crater The giant hole left by a volcanic eruption. They sometimes fill in with water to make crater lakes. Magma chamber An underground store of magma/ the reservoir of magma located deep inside the volcanoes Vent A long tube or pipe that allows magma to escape to the surface. Fill in the blanks. Volcanic eruptions, while awe-inspiring and dangerous to humans, serve a critical role in enabling life to exist. Without them, the Earth would have no atmosphereor oceans. Over the long term, volcanic eruptions continue to create many of the rocks that comprise the planet’s surface, while in the short-term, eruptions periodically re-sculpt that surface. Volcanoes are essentially openings in the crust of the Earth, and they can expel lava, gases, ash and rocks.Eruptions can range from a gentle gurgle to a violent, deadly burst.Eruptions occur when the pressure inside the volcano increases, causing its molten liquid rock to shift and release its energy. Technically speaking, quiet eruptions are known as effusive eruptions. These eruptions are relatively tame eruptions are characterized by an outpouring of thin, liquid-like lava, as seen with many Hawaiian volcanoes. Explosive eruptions, on the other hand, conjure up images of a Mount Saint Helens-like blast, generally posing a far greater threat to human life and property. These eruptions are like a cork in a bottle. A type of explosive eruption is a pyroclastic eruption. These are the most deadly of all volcanic hazards. They have so many gases built up it does not produce magma when it erupts it is hot gas, ash, and cinder bombs. This kind of eruption is what destroyed Pompeii. Geologist use instruments to such as a _ to detect changes in slope of a volcano. Creep Meter Tiltmeter Magma thermometers Charts and graphs Match the stages of a volcano with their descriptions. Active Currently erupting-quiet or explosive Has had at least one eruption in last 1000 years Dormant Sleep Giant Expected to erupt again Extinct Has not erupted for over 10,000 years The Flagstaff volcano is in this stage. The viscosity of lava depends on temperature and the amount of in the magma rocks Salt Silica Gases