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When you step into a full bathtub, you learn a lot about displacement of water. As your body sinks into the tub, the water moves out of the way. But water is also pushing up on you as you enter into it. This title reveals the science behind buoyancy and why objects float, even if they are large cruise or military vessels.

Hybrid cars, which run on alternative energy sources like sunlight, corn, and biofuels, may be the key to using less oil. This title discusses how these machines work, the science behind the energy they make, and what the use of hybrid cars means for the planet.

When you walk into a room and flip a light switch, a lightbulb turns on, illuminating the area. But how does one small switch do such a large job? This title enlightens readers about the science behind electricity and circuits through full-color illustrations and photographs.