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The same water that has existed on Earth for millions of years travels through a series of steps in a cycle from mountains to the sea, flows in and out of the cells in your body, and comprises 95% of the mass of a jellyfish. In short, water is the connective tissue that inextricably links you and the environment. This free selection includes the Table of Contents, Introduction, and Index. A section of inquiry-based water activities is also included.