archimedes' principle

Experiments with step-by-step instructions help children understand the basic scientific principles that determine whether an object floats or sinks.

Simple text and experiments illustrate why objects sink and float.

Uses simple experiments and activities to explore concepts such as density, upthrust, and water displacement and to explain why objects float or sink.

Uses simple experiments and activities to demonstrate the properties of water and such principles as floating.

Simple activities introduce the qualities of things that float in water, the difference between floating and swimming, and how balloons and airships stay up in the air.

Provides eleven experiments for children that help to explain why things float.

Describes why things float or sink and presents simple experiments to demonstrate the scientific principles involved.

Introduces terms and concepts related to floating and sinking through descriptive text, photographs, and a story about a young girl learning how to swim.

Presents experiments demonstrating the buoyancy of water.

Illustrates with experiments how objects displace water to stay afloat, why some objects float and others sink, and why the water's ability to sustain weight makes swimming, diving, and other water sports possible.