"In Gravity: Mass, Energy, and the Force that Holds Things Together, scientists ages 8 to 12 explore the invisible but powerful force that is responsible for keeping the entire universe in place--including you! Gravity is the natural phenomenon that makes everything in the universe attracte dto everything else. On Earth, that means gravity is why we fall down toward the ground, the reason we have tides, and why we eigh a certain number of pounds."--...

Simple language and humorous illustrations show how forces make things move, prevent them from starting to move, and stop them from moving. There are forces at work whenever you throw a ball, run up the stairs, or push your big brotheroff the couch. Want to learn more about the forces around you? Read and find out!