Motion - When an object changes its position over time, Stationary - Not moving; position does not change, Distance - How far an object travels, Time - How long something takes, Speed - How fast something moves, Straight-line motion - Movement in one direction without turning, Constant speed - Moving equal distances in equal time intervals, Variable speed - Changing speed over time, Units - Standard quantities used for measurement, m/s - Metres per second, the SI unit of speed,

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