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Design Your Own Experiment

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Demonstrations of the properties of density and buoyancy exist in our environment in numerous forms. Everyday sights such as helium balloons floating away or a thin slick of oil on a roadside puddle show the principles we have investigated in our experiments. Think of ways to vary the conditions you observe that will answer questions you have about buoyancy.

Check the For More Information section and talk with your science teacher or school or community media specialist to start gathering information on density and buoyancy questions that may interest you. As you consider possible experiments, be sure to discuss them with your science teacher or another knowledgeable adult before trying them. Some materials or procedures might be dangerous.

Steps in the Scientific Method

To do an original experiment, you need to plan...

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1. Introduction
2. Density is measured on a relative scale
3. Relative density can be observed
4. Look! It floats
5. Experiment 1 - Density: Can a scale of relative density predict whether one material floats on another?
6. Experiment 2 - Buoyancy: Does water pressure affect buoyancy?
7. Design Your Own Experiment