Force - the push or pull on an object with mass, Newtons (N) - a unit of force; what force is measured in, Applied Force -  the force exerted on an object by a person or another object, Magnetic Force - attractive or repulsive force between electrically charged particles within a magnetic field, Atom - smallest unit of a chemical element, Electrical Force - attractive or repulsive force that exists between all charged particles, Friction - a force that opposes motion, Gravity - pulls on objects without actually touching them, Normal Force - the support force exerted upon an object that is in contact with another stable object, Electron - small particle of matter with charge of negative electricity,

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