• Matter is all the “stuff” that exists in the universe.
  • Everything you can see and touch is made of matter, including you.
  • In science, matter is defined as anything that has mass and volume.
  • Mass is commonly confused with weight.
  • The two are closely related, but they measure different things.
  • Whereas mass measures the amount of matter in an object, weight measures the force of gravity acting on an object.
  • If the strength of gravity is held constant, then an object mass is directly proportional to the objects weight.
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