Converging plate boundries are the plates that move together, these are in the form of trench and island arc systems. Diverging pull apart from each other, which creates mid oceanic ridges as magma from the mantle upwells through a crack in the oceanic crust and cools. In the case of earthqueakes these happen by transform or convergent type plate boundaries, which form the largest fault surfaces on earth, they will move past each other smoothly and aseismically only if there are no irregularities or asperities along the boundary that increase the frictional resistance. Three major types of valcanoes are shield valcano, stratovolcano, and cinder cones. Shield volcanoes are large with shallow-sloping sides. Stratovolcanoes are tall, conical volcano composed of many layers of hardened lava, tephra, and volcanic ash. Cinder cones are steep conical hill of volcanic fragments that accumulate around and downwind from a volcanic vent. The Ring of Fire is an area of frequent earthquakes and volcanic eruptions, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and plate movements. I'll use this information in the future because now I know about how the plates effect the earth. I never knew how much of an impact it had on the earth. Others might say that is doesn't matter, but it does because the reason the earth is like this today is because of the plates moving. Common good would support this because people can be informed about it.
Sources:
1. Maggi Glasscoe9/8/98http://scign.jpl.nasa.gov/learn/plate4.htm
2. Wikimedia Foundation, Inc.8 June 2008http://en.wikipedia.org/wiki/Plate_tectonics
Pictures:
1. Image:Tectonic plate boundaries.png
2. Image:Pacific Ring of Fire.png
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