Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 12 - Think and Explain - Page 242-243: 46

Answer

It decreases.

Work Step by Step

Freezing the liquid water expands it. Density = $\frac{mass}{volume}$, so density decreases as the water volume increases. Their densities may be found in Table 12.1. This is discussed on page 230, Table 12.1.
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