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vocab for chapters 1-5, a-d


rate of change of velocity; can be calculated by dividing the change in by the time it takes the change to occur

air resistance

force that opposes the motion of objects that move through the air

average speed

total distance an object travels divided by the total time it takes to travel that distance

balanced forces

forces on an object that combine to give a zero net force and do notchange the motion of the object


occurs when a scientist's expectations change how the results of an experiment are viewed

centripetal acceleration

acceleration of an object toward the center of a curved or circular path

centripetal force

a net force that is directed toward the center of a curved or circular path

chemical potential energy

energy stored in chemical bonds

compound machine

machine that is a combo of two or more simple machines


in an experiment, a variable t hat does not change when other variables change


standard used for comparison of test results in an experiment


mass per unit volume of a material

dependent variable

factor that changes as a result of changes in the other variables


distance and direction of an object's change in position from the starting point


how far an object moves

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