Final answer:
Density is a measure of how much mass is contained in a given volume of an object or substance. It helps us understand how closely packed the particles in a material are and can determine whether an object will float or sink in a liquid.
Step-by-step explanation:
Density is a measure of how much mass is contained in a given volume of an object or substance. It is a property that helps us understand how closely packed the particles in a material are. If the particles are tightly packed, the object will have a high density, and if they are loosely packed, the object will have a low density.
For example, a block of iron has a higher density than a block of wood because iron is more dense, meaning it has more mass packed into the same volume. Similarly, a helium balloon has a lower density than a basketball because helium is less dense, meaning it has less mass packed into the same volume.
Density can also be used to predict whether an object will float or sink in a liquid. If the density of an object is less than the density of the liquid it is placed in, it will float. However, if the density of an object is greater than the density of the liquid, it will sink.
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