描述
Leo teaches his cat Pallas all about simple machines by applying his knowledge of science to their stone age world. Engaging illustrations and stories provide a fun introduction to science concepts, including wheel and axles, levers, pulleys, wedges, screws, and more. Information boxes accompany each story to explore real applications of simple machines in the natural and designed world.
書籍詳情
格式
精裝書
頁數
32 頁
語言
英語
已出版
Sep 1, 2015
出版商
Crabtree Classics
ISBN-10
0778718905
ISBN-13
9780778718901