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# What best describes density?

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According to the science department at Elmhurst College, the density of an object is how relatively heavy an object is at a fixed volume. Mathematically, the definition of density is mass divided by volume, where the standard mass is in grams and the standard volume is in milliliters.

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Credit: Anthony Mayatt E+ Getty Images

Less dense objects float in solvents that are more dense. Since water has a density of one gram per milliliter, any object that is less dense than water is likely to float on water. Objects with a volume in milliliters greater than their mass in grams most likely will float in water.

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