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"This feature is our annotated guide to the most useful websites for teaching U.S. history and social studies. We have carefully selected and screened each website for quality and provide a paragraph annotation that summarizes the site's content, notes its strengths and weaknesses, and emphasizes its utility for teachers. Information is provided on the type of website (Archive, Electronic Essay, Gateway, Journal, Organization, Syllabi/Assignments) and the type of resource (text, images, audio, and video). Browse sites by topic and time period or look through a list of some of our favorite sites on this page. The full search feature allows you to quickly locate WWW.History resources by topic, time period, keyword, or type."

"Weather is a set of all the phenomena occurring in a given atmosphere at a given time. Weather phenomena lie in the hydrosphere and troposphere. Weather refers to current activity, as opposed to the term climate, which refers to the average atmospheric conditions over longer periods of time. When used without qualification, "weather" is understood to be the weather of Earth."