The main objective of this text is to present a clear and comprehensive introduction to major topics in physics, chemistry, astronomy, geology, oceanography, and meteorology. The appealing full-color presentation includes numerous applications of current interest and emphasizes science as a human endeavor pivotal to modern society. In this fifth edition, many new or revised full-color illustrations and photographs enliven scientific concepts and capture student interest. "Scientific Enterprise" sections highlight the interconnection of different sciences, helping students view the sciences as related parts of a whole.