Pueblo Bonito essays

Pueblo Bonito essays The famous Pueblo Bonito is located in North West New Mexico and contains some of the most spectacular Indian ruins of North America. Some archaeologists say that this lone fact makes this site one of the most valuable and important places, especially for reconstruction. Archaeologists and researchers, in fact, have already proved this to be true. They have found pottery dating back to 920 A.D. that can tell us about the technology and trade of the Anasazis in the Chaco Canyon region. Kivas, partly underground chambers used for religious ceremonies, can be found all throughout the ruins of Pueblo Bonito. The kivas tell about the Anasazi religion and how they worshipped. The Anasazi Indians are known for building great houses such as Pueblo Bonito, which, in fact, are towns within themselves. These great houses are an important aspect of the research of Pueblo Bonito because of how much the architecture can tell archaeologists about these ancient peoples. For example, archaeologists can tell that characteristics of the great houses include planned layouts, distinctive masonry, multi-story construction, and kivas. The location that the Anasazi people chose for Pueblo Bonito also contributes to the importance of Chaco Canyon and Pueblo Bonito. The location was unusual because they built it under a separated piece of a cliff wall. This piece was called Threatening Rock, standing 97 feet high and weighing about thirty thousand tons. The Anasazi people knew of this threat and built a supporting terrace which slowed the erosion of the soil. This worked well for them, because Chaco Canyon has a desert-like climate. The terrace worked quite well for the Anasazis, because the Threatening Rock did not fall until 1941. From the first excavations of Pueblo Bonito by Richard Wetherill, a rancher, and archaeologist George Pepper, to the most recent, archaeologists have ...

Chain Reaction Definition in Chemistry and Physics

Chain Reaction Definition in Chemistry and Physics In science, a chain reaction is a series of reactions where the products contribute to the reactants of another reaction without outside influence. The idea of chain reactions was introduced by German chemist Max Bodenstein in 1913 in reference to chemical reactions. Chain Reactions Examples A nuclear chain reaction is a fission reaction where the neutrons generated by the fission process go on and initiate fission in other atoms. The chemical reaction between hydrogen gas and oxygen gas to form water is another example of a chain reaction. In the reaction, one hydrogen atom is replaced by another as well as two OH radicals. The propagation of the reaction can lead to an explosion. Chain Reaction Steps A typical chain reaction follows a sequence of steps: Initiation: Active particles form that serve as the basis for the reaction.Propagation: Active particles react with each other and may serve as catalysts to perpetuate the cycle.Termination: The active particles lose their activity, slowing and ending the reaction.