the length of a line between two points, Distance, a change in an object’s position, Motion, the path that a moving object follows, Direction, a measure of how far an object moves in a certain amount of time, Speed, a line graph that shows an object’s motion, with time on the x-axis and distance on the y-axis, Distance-time Graph, a push or a pull, Force, equal forces in opposite directions; cause an object to remain in place or moving at a constant speed, Balanced Forces, forces that cause an object to start moving, stop moving, or change direction, Unbalanced Forces, the amount of matter an object contains, Mass, a force that acts between surfaces that touch each other, Friction, a force that pulls objects toward each other, Gravity, anything that has mass and takes up space, Matter, a force that acts against the pull of gravity, Air Resistance, the location of an object, Position

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