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semester review

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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 variable
in an experiment, a variable that does not changes when other variables change. constant
standard used 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 of 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
A tendency to do nothing or to remain unchanged: inertial
the speed and direction of a moving object Velocity
distance an object travels per unit of time speed
first law of motion: a body remains at rest or in motion with a constant velocity unless acted upon by an external force. newton's 1st 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. newton's 2nd 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 newton's 3rd law of motion
force that opposes the sliding motion between two toughing 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 positions potential energy
states that energy can never be created or destroyed law of conservation of energy
sum of the 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
machine that is a combination of two or more simple machines. Compound Machine
ratio of the out put work done by the machine to the input work done on the machine, expressed as a percentage. Efficiency
ratio of the out put force exerted by a machine to the input force applied to the machine Mechanical Advantage
transfer of thermal energy by collisions between particles in matter at a higher temperature and particles in matter at a lower temperature Conduction
transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another Convection
transfer of thermal energy by electromagnetic waves Radiation
thermal energy that flows from a warmer material to a cooler material Heat
material in which electrons are not able to move easily Insulator
material such as copper wire, in which electrons can move easily Conductor
measure of the average kinetic energy of all the particles in an object Temperature
meters Length
grams mass
cubic meters Volume
cubic centimeters Density
Joules Work
watts Energy
newtons force
mph speed
mps squared Acceleration
sec Time
degrees Celsius kelvins Temperature
A method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement Scientific method
Created by: reaginicfiddle4
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