How Big? How Heavy? How Dense?

Jennifer Boothroyd Brendan Howard Taylor Happy Hollow Library Southridge Ms. Chng

出版社：Lerner Publications

出版时间：2011-01

ISBN：9780761360957

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页数：32

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A light beach ball floats on the water. A heavy rock sinks in the mud. Matter is all around us. But what makes a beach ball different from a rock? And what properties do we use to compare matter? Read this book to find out!

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