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# PS Semester Test

### Test

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
A variable that does not change 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 form 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 in velocity Acceleration
a push or pull exerted on an object. force
Resistance of an object to a change in its motion. Inertia
The speed and direction of a moving object. Velocity
Distance an object travels per unit of time. Speed
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. 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
Stored energy an object has due to its position. force
Resistance of an object to a change in its motion. Inertia
meters per second Speed
The speed and direction of a moving object. Mechanical Energy
States that an object moving at a constant velocity keeps moving at that velocity unless an unbalanced net force acts on it. If an object is at rest, it stays at rest unless an unbalanced net force acts on it. Newton's 1st Law of Motion
Machine that does work with only one movement. Simple Machine
Distance an object travels per unit of time. Speed
States tat when one object exerts a force on a second object, the second object exerts force on the first object that is equal in strength and in the opposite direction. Newton's 3rd Law of Motion
force that opposed the sliding motion between two touching surfaces. Friction
Transfer of thermal energy by collisions between particles in matter at a higher temperature and particles in matter at a lower temperature. Conduction
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
Transfer of thermal energy by electromagnetic waves. Radiation
States that energy can never be created or destroyed. Law of Conservation of Energy
material such as copper wire, in which electrons can move easily Conductor
sum of the potential energy and kinetic energy in a system. Temperature
Energy a moving object has because of its motion Kinetic Energy
meters Length
Stored energy an object has due to its position. Potential Energy
Machine that is a combination of two or more simple machines. Volume
Mass per unit volume of a material. Density
Ratio of the output work done by the machine to the input work done of the machine, expressed as a percentage. Efficiency
sum of the potential energy and kinetic energy in a system. Mechanical Energy
Seconds Time
Kelvin Temperature
kilograms Mass
cubic meter Volume
kilogram per cubic mete Density
joule Temperature
joule Energy
Created by: EdgarRamos