Gravity, A force that accelerates (or pulls) an object toward the center of Earth., Mass, The amount of matter that makes up an object. Mass does not change based on where you are., A measurement that is taken using a scale and is determined by the pull of gravity. Weight can vary based on where you are and the pull of gravity in that area., Weight, Resistance, A measure of a force acting in the opposite direction., Acceleration, An increase in the rate or speed of somet, Atmosphere, The gases that surround Earth or another planet, Newton's law of universal gravitation, Every particle attracts every other particle with a force that is proportional to their masses and inversely proportional to the square of distance between them., Force, Any interaction that can change the motion of an object., Galileo, An Italian astronomer, physicist, and engineer. He is sometimes known as the “Father of Observational Astronomy.”, Issac Newton, An English mathematician and physicist who is known for formulating the theory of universal gravity. Newton’s three laws are commonly studied in middle and high school.

Gravitational Force

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