描述
What do jar tops and water-bottle lids have in common? Both of them are screws! Screws are simple machines. They help us to do jobs more easily. But don't take our word for it. Put screws to the test with the fun experiments you'll find in this book. As part of the Searchlight Books(TM) collection, this series sheds light on a key science question―How Do Simple Machines Work? Hands-on experiments, interesting photos, and useful diagrams will help you find the answer!
书籍详情
格式
电子书
页数
40 页
语言
英语
已发布
7月 1, 2011
出版商
Lerner Digital
版本
2 个版本
ISBN-10
0761382097
ISBN-13
9780761382096