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GRAVITY Force that causes objects with mass to attract 1 another.
GRAVITATIONAL ATTRACTION Force that pulls 2 objects towards each other; greater an object's' mass, the greater the attraction; further apart the objects, the weaker the attraction.
NEWTON'S LAW OF UNIVERSAL GRAVITATION Law that says every object in the universe attracts every other object, & force is affected by mass & distance: greater the mass of an object, the greater the attraction; farther apart the objects, the weaker the attraction.
MASS Amount of matter in an object; a body or object.
SIR ISAAC NEWTON English mathematician, physicist, astronomer, theologian, & author who's widely recognized as 1 of the most influential scientists of all time, & a key figure in the scientific revolution; considered the founder of the concept for GRAVITY.