Here are the statements that accurately describe density:
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Density is a derived unit of measure.
This statement is true. Density is calculated as mass per unit volume (e.g., grams per cubic centimeter or kilograms per liter). -
The density of an object determines whether it will sink or float.
This statement is true. An object will float in a fluid if its density is less than that of the fluid; if its density is greater, it will sink.
The other statements are not accurate:
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Density is a chemical property of an object.
This statement is false. Density is a physical property, not a chemical one. -
The density of an object is constant.
This statement is not entirely true. While the density of a homogeneous substance under constant conditions (temperature and pressure) is constant, the density can change with changes in temperature, pressure, or the object's composition. -
Density is the sum of the mass and volume of an object.
This statement is false. Density is not the sum of mass and volume; it is the ratio of mass to volume (mass/volume).