Mass...: is measured in kilograms, kg, is not affected by gravity, is the quantity of matter in an object, can be measured in grams, g, is the property of a planet that makes the planet have gravity, Weight...: of an object is affected by the strength of gravity on a planet, is measured in Newtons (N), of an object decreases as the objects goes further away from Earth, is the force needed to lift an object, is equal to the contact force on a level surface that is not moving,

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