This new addition to the series introduces the concept of Earth System Science and explains how the new emphasis on the Earth system approach is revolutionizing our understanding of global-scale Earth processes and changes. Separate chapters cover the Earth's major systems (atmosphere, hydrosphere, cryosphere, geosphere, and biosphere); the Big Bang and alternate theories of the universe's origin; galaxies, stellar evolution, and other space phenomena; our solar system; the Earth'Moon system; geology and the geolologic time scale; plate tectonics and continental drift; weathering and erosion; the world's oceans and atmosphere; and environmental considerations. Barron's Easy Way books focus on both practical and academic topics, presenting fundamental subject matter in clear, understandable language. Equally popular as self-teaching manuals and supplementary texts for classroom use, they are written to help students improve their grades and review subject matter before tests. They are also useful for introducing general readers to a new career-related skill. Easy Way titles cover virtually all subjects that are taught on advanced high school and college-101 levels. New subjects are periodically added, and existing titles are frequently updated to keep them timely and relevant to students needs. Subject heads and key phrases are set in a second color.