give the 3 kinds of volcanoes and explain?

Answer 1

Principal Types of Volcanoes
***cinder cones, composite volcanoes, shield volcanoes, and lava domes.

(1)Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or so above their surroundings. Cinder cones are numerous in western North America as well as throughout other volcanic terrains of the world.

(2)Composite volcanoes:Some of the Earth's grandest mountains are composite volcanoes--sometimes called stratovolcanoes. They are typically steep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8,000 feet above their bases. Some of the most conspicuous and beautiful mountains in the world are composite volcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta in California, Mount Hood in Oregon, and Mount St. Helens and Mount Rainier in Washington.

Most composite volcanoes have a crater at the summit which contains a central vent or a clustered group of vents. Lavas either flow through breaks in the crater wall or issue from fissures on the flanks of the cone. Lava, solidified within the fissures, forms dikes that act as ribs which greatly strengthen the cone.The essential feature of a composite volcano is a conduit system through which magma from a reservoir deep in the Earth's crust rises to the surface. The volcano is built up by the accumulation of material erupted through the conduit and increases in size as lava, cinders, ash, etc., are added to its slopes.

(3)Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.

(4)Volcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent.

***Based on activity there are 3 types of volcanoes
1. Active volcanoes: which erupt regularly e.g. St Helens
2. Dormant volcanoes: which haven't erupted in a long time but still have the potential to erupt e.g. Vesuvius
3. Extinct volcanoes: which were active once but are no longer active and will never erupt e.g. Krakatoa

Answer 2

Stratovolcanoes are shaped like a cone, but have very steep sides. They are formed during violent eruptions by lava flows, tephra, and pyroclastic flows. They are formed by several vents that lead from deep underground and may form cinder cones nearby.

Cinder cones are steep sided hills made up of fragments from a volcanic eruption. The fragments that form these cinder cones are blown down wind from an eruption from a stratovolcano. You can see the stratovolcano that formed this cinder cone in the background.

Shield volcanoes are the largest volcanoes on earth. They are built by basalt lava flows and have gentle slopes that move from the top of the volcano to the bottom.

Mud volcanoes are the smallest of the volcanoes. They are only 2-3 meters/6-9 feet tall. They are built from by a mixture of hot water and sediments from an eruption by another larger volcano.

Lava domes are built by a kind of viscous lava. Viscous lava is a thick mixture that can not flow quickly, so the lava cools too quickly to really move any distance from the eruption.

A caldera is an area at the to of a volcano that has collapsed. After eruptions, when the area below the top is sometimes empty, the bottom falls out and the top crashes down. Calderas are not craters.

Answer 3

1. Sam - Sam really had nothing to do with anything and so can't be classified as either bad or good. He had other things to do besides help a hysterical girl. If the "volcano" was really such a threat as Kristen seemed to think and if he was a close friend of Brad's, he probably would have dropped these things to save Brad's life. 2. Andrew - He's absolutely right for beating the s.hit out of Brad for being such a dumb jerk. The only reason Kristen slept with Ken in the first place was to _save_ his stupid a.ss. 3. Kristen - Just not very smart, but has a big heart. Not a careful or rational thinker. Obviously doesn't realize that Brad doesn't care about her or he would have been thoughtful enough to contact her and ease her worries. Probably should dump Brad's a.ss. 4. Brad - Inconsiderate. Overreactive. Self-centered; doesn't realize others love and are concerned about him, perhaps because he doesn't know how to love others. Acted like Kristen had sex just for the crap of it or to pass the time. Never cared about Kristen in the first place because someone who cared about his partner would never throw her out on the street, homeless, while knowing the full intentions of all her actions were to save him. 5. Ken - D.ickhead who demands rewards for himself while another person is in serious danger. Overall, though, if the "volcano" actually was an immediate threat, every single one of these characters would have been a flaming idiot.

Answer 4

1. Active volcanoes: these are ones which erupt regularly e.g. St Helens
2. Dormant volcanoes: these are ones which haven't erupted in a long time but still have the potential to erupt e.g. Vesuvius
3. Extinct volcanoes: these are ones which were active once but are no longer active and will never erupt e.g. Krakatoa

Answer 5

active volcano,domain volcano and extinct volcano

Answer 6

Cone, Shield and Dome. Check out volcanoes.usgs.gov for really good descriptions of each and some great photos.

Answer 7

collapsing coldera, stratovolcano, and a fissure volcano. and figure them out yourself dont be lazy

Answer 8

Cone, Shield, Dome.

Or

the hot one, the cold one, and the third one.

I always get those confused.