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semester test ;)

science semester test review

QuestionAnswer
factor that changes as a result of changes in the other variables. Dependent variable
factor that, as it changes, affects the measure of another variable. Independent
in an experiment, a variable that does not change when other variable change. Constant
standard use for comparison of test results in an experiment. Control
explanation of things or events that is based on knowledge gained from many observations and investigations. theory
statement about what happens in nature that seems to be true all the time; does not explain why or how something happens. Scientific law
rate of change or velocity; can be calculated by dividing the change in the velocity by the time it takes the change to occur. Acceleration
A push or pull exerted on an object. Force
resistance of an object to a changes color in acids and bases. Inertia
the speed and direction of a moving object. Velocity
distance an object travels per unit of time. speed
Newtons first law of motion
states that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass. Newtons second law of motion
states that when one object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength and in the opposite direction. Newtons third law of motion
force that opposes the sliding motion between two touching surfaces. Friction
energy a moving object has because of its motion; depends on the mass and speed of the object. kinetic energy
stored energy an object has due to its position. potential energy
states that energy can never be created or destroyed. Law of conservation of energy
sum of potential energy and kinetic energy in a system. Mechanical energy
machine that does work with only one movement lever, pulley, wheel and axle, inclined plane , screw, and wedge. Simple machine
Created by: josesexyman
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