Gravity : mass, energy, and the force that holds things together: with hands-on science
"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...
Nomad Press, a division of Nomad Communications
|Series:||Build it yourself|