Cambridge University Press Cambridge Factbooks 6 Why Do Balls Bounce?
Publikace: A series of twenty non-fiction science readers which engages children in the world around them. What is gravity? Why don't skydivers fall off into space? Do heavy objects fall faster than light objects? You can find the answers to these and other que - Rob Moore. Anotace: Zjednodušená četba pro děti ...a dál?