In order to explain the many intricate processes on Earth, scientists often create models. Whether it's how water moves through the Earth, its bodies of water, and the atmosphere, or how energy moves throughout an ecosystem, these models help students understand the world around them. This set gives a simple overview of food chains and webs, the carbon cycle, cycles in space, and others, for struggling readers in need of extra help in science class. With helpful diagrams and curriculum-correlated text, this set is a must-have for schools and libraries. Features include: A low reading level makes upper elementary concepts available to struggling readers. Provides a succinct review for test or class preparation. Supports several of the Next Generation Science Standards.