Many cycles occur on Earth that keep Earth?s different systems connected. Introduce students to the various elements that help create Earth?s many cycles. Create an interest in this topic and keep students engaged throughout their reading with high-interest text, vibrant images and diagrams, engaging facts, an easy-to-navigate table of contents, and a helpful glossary and index. To bring concepts to life, a ?Think Like a Scientist? activity that supports STEM instruction is included at the end of the e-book.