wasted energy / chemical change / people inside saves energy / energy output/wattage / chemical changes / art media / gas station lights / energy efficiency / energy efficient / chemicals / energy / /
NaturalFeature
Yosemite Valley / /
Organization
Congress / White House / National Park Service / War Department / International Dark-Sky Association / National Parks and Conservation Association / Forest Service / Department of the Interior / U.S. Department of the Interior / /
Person
George Catlin / Stephen T. Mather / Lane / Charles A. Beard / Horace M. Albright / Woodrow Wilson / Barry Mackintosh / Johnson / Franklin D. Roosevelt / Sheet / / /
Position
assistant director / Interior Secretary / artist / President / rst director / dealer / assistant / /
Preserving The Dark Sky In Parks SUBJECTS: Science, Language Arts, History-Social Science GRADE: 6th