"Did you know that about 18.5 percent of a human body's mass is carbon? All life on Earth depends on carbon. How carbon is taking in and given off through animals' breathing, the burning of fossil fuels, and more can be shown in the model known as the carbon cycle. In this informative and interesting book, readers will discover how the carbon cycle works. Designed to appeal to struggling readers, helpful diagrams are provided to clarify complex concepts...

"This informative book is designed to help struggling readers grasp the nitrogen cycle. There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. Low-level language, fact boxes, and an extended glossary provide readers with key vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move...

"What happens in space has an influence on our lives. As Earth moves around the sun, the seasons on Earth change. The movement of the moon affects the tides in Earth's oceans. In this book, readers explore the cycles in the space that most affect us and the space science taught in upper elementary science classes. Accessible language and simple explanations make this the perfect introduction to Earth's cycles for readers struggling with traditional...

Explains how our planet's water is recycled and reused through a series of natural phenomena.

Follows the development of a horse from the time its mother is pregnant until it is fully grown.