What Floats? What Sinks?
A Look at DensityBook - 2011
A rock sinks in the water. a hot air balloon floats in the air. Many objects float and sink. But what makes them move this way? and how do people use floating and sinking in their lives?
Publisher: Minneapolis : Lerner Publications, c2011
Branch Call Number: J 532.25 BOOT
Characteristics: 32 p. : col.ill