Look at this map of current volcano hazards. Click a few volcanoes to determine their warning levels. Why is it possible to have a warning system for volcanoes? If you were a volcanologist, would you watch certain volcanoes on the map more than others? ANSWER: It is possible to predict a volcanic eruption by studying the rate of change in gases released, change in seismic activity, change in ground deformation, and so on. These are telltale signs before an eruption. Looking at the map, volcanologists should focus on Kilauea and Shishaldin, as these two volcanoes are at the watch alert level and are at a heightened risk of eruption.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

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