From the world's highest mountains to its lowest valleys, Earth is comprised of all sorts of landforms. Readers of this engaging set will learn about the physical characteristics that help make up these fascinating features. Informative narratives teach readers to identify different types of landforms, an important part of the elementary social studies curriculum. Understanding how different landforms interact with their environment is a key component of the Next Generation Science Standards. Colorful photographs and age-appropriate nonfiction content help readers develop a strong understanding of Earth's features. Features include: Cross-curricular content reinforces lessons from science and social studies standards. Concise glossaries familiarize readers with key vocabulary. Eye-catching photographs aid in comprehension of content.