What Is Density?

ISBN: 9780516246604

作者: Joanne Barkan

出版社: Scholastic Library Pub

出版年: 2006-9

页数: 32

定价: $ 5.59

装帧: Pap

内容简介

What do a softball, a popcorn ball, and a birthday party balloon have in common? They all are made of matter and take up space. Is What Is Density? young readers will find out why the baseball is heavier than the popcorn ball and why they'd better hold on to the string of that balloon