Gravity plays a critical role for all life on Earth--without it, everything would float away! Readers will learn key ideas about gravity with this engaging title. The explanatory text carefully crafted for second to third-grade readers covers science curricular concepts including gravitational pull, Newton's Law of Gravitation, and centrifugal force. Vibrant images and appealing fact boxes on each spread enhance comprehension of important aspects of gravity. "Compare and Contrast" and "Consider This" fact boxes also inspire deeper thinking about gravity's properties. This title is sure to inspire a lasting appreciation and understanding of gravity and how this invisible and mysterious force structures Earth and space.