• Matter - anything that has mass and takes up space

  • Mass - the amount of "stuff" making up an object

    • Stars

    • Electrons

    • Neil Diamond

  • Inertial Mass

    • How hard it is to accelerate an object
  • Gravitational Mass

    • How large a gravitational force an object experiences


  • Energy - The ability or capacity to do work

  • Work - the process of moving an object

Mass-Energy Equivalence

  • In the early 20th century, Albert Einstein formalized a relationship between mass and energy

  • The mass of an object, a key characteristic of matter, is really a measure of its energy

  • The source of all energy on Earth is the conversion of mass into energy

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