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15 terms

semester 1 exam a-d vocab

vocab for chapters 1-5, a-d
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acceleration
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
bias
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
constant
in an experiment, a variable t hat does not change when other variables change
control
standard used for comparison of test results in an experiment
density
mass per unit volume of a material
dependent variable
factor that changes as a result of changes in the other variables
displacement
distance and direction of an object's change in position from the starting point
distance
how far an object moves