설명
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.
책 세부 정보
형식
페이퍼백
페이지
32 페이지
언어
영어
출판됨
Sep 1, 2015
출판사
Crabtree Classics
ISBN-10
0778719170
ISBN-13
9780778719175