Mass, a measure of the amount of matter in an object, can be categorized from smallest to greatest typically as follows: subatomic particles (like electrons and protons), atoms (such as hydrogen and carbon), molecules (like water and glucose), and macroscopic objects (ranging from everyday items to celestial bodies). For instance, a hydrogen atom is lighter than a water molecule, which in turn is lighter than a small rock. This hierarchy illustrates the increasing scale of mass from fundamental particles to large objects in the universe.
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