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Semester Test review

PS

QuestionAnswer
Dependent Variable Factor that changes as a result of changes in the other variables.
Independent variable Factor that as it changes affects the measure of another variable.
Constant A variable that does not change when other variables change.
Control Standard used for comparison of test results in an experiment.
Theory Explanation of things or events that is based on knowledge gained form many observations and investigations.
Scientific law Statement about what happens in nature that seems to be true all the time; does not explain why or how something happens.
Acceleration Rate of change in velocity
force a push or pull exerted on an object.
Inertia Resistance of an object to a change in its motion.
Velocity The speed and direction of a moving object.
Speed Distance an object travels per unit of time.
Theory Explanation of things or events that is based on knowledge gained form many observations and investigations.
Scientific law Statement about what happens in nature that seems to be true all the time; does not explain why or how something happens.
force a push or pull exerted on an object.
Inertia Resistance of an object to a change in its motion.
Speed Distance an object travels per unit of time.
Velocity The speed and direction of a moving object.
Newton's 1st Law of Motion 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.
Simple Machine Machine that does work with only one movement.
Speed Distance an object travels per unit of time.
Newton's 3rd Law of Motion 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.
Friction force that opposed the sliding motion between two touching surfaces.
Conduction Transfer of thermal energy by collisions between particles in matter at a higher temperature and particles in matter at a lower temperature.
Newton's 2nd 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.
Radiation Transfer of thermal energy by electromagnetic waves.
Law of Conservation of Energy States that energy can never be created or destroyed.
Conductor material such as copper wire, in which electrons can move easily
Mechanical Energy sum of the potential energy and kinetic energy in a system.
Kinetic Energy Energy a moving object has because of its motion
Length meters
Potential Energy Stored energy an object has due to its position.
Compound Machine Machine that is a combination of two or more simple machines.
Density Mass per unit volume of a material.
Efficiency Ratio of the output work done by the machine to the input work done of the machine, expressed as a percentage.
Mechanical Energy sum of the potential energy and kinetic energy in a system.
Time seconds
Temperature Kelvin
Heat kilograms
Insulator cubic meter
Conductor kilogram per cubic meter
Temperature joule
Length joule
Created by: rroberto
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