The study is an experiment in light of the fact that the scientists control one variable to decide the impact on another.
An experiment is an investigation intended to contrast advantages of an intervention and standard medications, or no treatment, for example, another medication treatment or aversion program, or to indicate circumstances and end results. This sort of study is performed tentatively. Subjects are chosen from an examination populace, doled out to the different investigation gatherings, and observed after some time to decide the results that happen and are created by the new medication treatment, treatment, or intercession.
Marble, Roman copy after a Greek original from ca. 430 BCE. The Athenian democracy of Cleisthenes<span>and </span>Pericles<span> was based on freedom, through the reforms of Solon, and equality (isonomia), introduced by </span>Cleisthenes<span> and later expanded by Ephialtes and</span>Pericles<span>.</span>
<span>A Century of Dishonor. Injustices to the Native Americans in the United States. A Century of Dishonor is a non-fiction book by Helen Hunt Jackson first published in 1881 that chronicled the experiences of Native Americans in the United States, focusing on injustices.</span>
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water pollution
I think that makes industrial revolution
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Six of the most important characteristics are: cities, government, religion, social structure, writing and art
