The Pacific Ring of Fire literally surrounds the basin of the Pacific Ocean, whereas the Hawaiian volcanoes are the result of the Hawaiian hotspot.
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There's no difference. Those are two ways of saying the same thing.
Spanish is from Spain, Hawaiian is from Hawaii. Those are two different geographical regions; look it up on a world map.
The Hawaiian volcanoes come from a hot spot whereas the ring of fire volcanoes are from subduction zones. A hot spot is an area that was thought to be a relatively stationary plume of hot rock coming up from deep in the Earth's mantle. As the Earth's crust passes over the hot spot, the plume burns through it, creating volcanoes. Recent research shows that rather than being relatively stationary, these hot spots actually do move. How they move is a subject of current research. Subduction zone volcanoes come from the melting of the down-going plate.
There are several hundred volcanoes that are in South America. Of those volcanoes, there are between 200 and 300 that are active.
Volcanoes underwater erupt in much the same way as those on dry land. They erupt when pressure builds up. The difference between these two types of volcanoes is that the lava produced in an underwater volcano cools dramatically faster than the lava on land.
The difference between "them" and "those" is that 'them' is an objective pronoun whereas 'those' is a demonstrative pronoun.
Volcanoes are only destructive to people and property when they erupt. Volcanoes can lie dormant for decades before they erupt. The Hawaiian Islands were all formed from eruptions of volcanoes in the ocean.
The volcanoes on the Hawaiian Islands northwest of the Big Island are no longer erupting primarily because they have moved away from the hotspot that created them. As the Pacific tectonic plate continues to shift, older volcanoes like those on Kauai and Niihau have become dormant as the supply of magma diminishes. Additionally, geological processes such as erosion and the cooling of volcanic material contribute to the cessation of volcanic activity in these regions.
There are several hundred volcanoes that are in South America. Of those volcanoes, there are between 200 and 300 that are active.
Most volcanoes on Earth are associated with boundaries of tectonic plates while those that we have seen on other planets are probably from hot spots. Earth's volcanoes also seem more prone to explosive eruptions, primarily due to the abundance of water on Earth.
If two plates converge and one goes under the other (subduction), then volcanoes can form at the point where the bottom plate is furthest into the area under the top plate, but this is sort of on plate boundaries. If a hot spot (abnormally hot area in the mantle under the crust) is in the center of a plate, it can still send up magma and cause volcanoes. A great example of this is the Hawaiian islands, which are in the center of the Pacific plate.
The type of lava flow that has affected the shape of the Hawaiian mountains is primarily basaltic lava. Basaltic lava is low in viscosity and flows easily, creating broad shield volcanoes with gentle slopes, such as those found in Hawaii. These lava flows build up over time, creating the iconic mountainous landscapes of the Hawaiian Islands.