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Semester Test:)
PS Voc
| Question | Answer |
|---|---|
| Dependent Variable | factor that changes as a result of changes in the other variables. |
| Independent Variable | factors that as it changes affects the measure of another variables |
| Control | standard used for comparison of test results in an experiment. |
| Theory | explanation of thinks or events that is based on knowledge gained from 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 of velocity can be calculated by dividing the change in the velocity by the time it takes the change to occur |
| Force | a push or pull exerted on an object |
| Inertia | resistance of an object to a change in its motions |
| Velocity | the speed and direction of a moving object |
| Speed | distance an object travels per unit of time |
| Newton’s 1st Law of Motion | |
| 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 |
| Newton’s 3rd Law of Motion | states that when one object exerts force on a second object the second object exerts a force on the first objects that is equal in strength and in the opposite direction |
| Friction | force that opposes the sliding motion between two touching surfaces |
| Kinetic Energy | energy a moving object has because of its motion depends on the mass and speed of the object. |
| Potential Energy | stored energy an object has due to its position |
| Law of Conservation of Energy | states that energy can never be created or destroyed |
| Mechanical Energy | sum of the potential energy and kinetic energy in a system |
| Simple Machine | machine that does work with only one movement ever pulley wheel and axle inclined plane screw and wedge |
| Compound Machine | substance formed from two or more elements in which the exact combination and proportion of elements is always the same |
| Efficiency | ratio of the output work done by the machines to the input work done on the machine expressed as a percentage |
| Mechanical Advantage | ratio of the output force exerted by a machine to the input force applied to the machine |
| Conduction | transfer of thermal energy by collisions between particles in matter to a lower temperature |
| Convection | transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another. |
| Radiation | transfer of thermal energy by electromagnetic waves |
| Heat | thermal energy that flows from a warmer material to a cooler material |
| Insulator | material in which electrons are not able to move easily |
| Conductor | material such as copper wire in which electrons can move easily |
| Temperature | measure of the average kinetic energy of all the particles in an object. |
| Length | meter |
| Mass | kilogram |
| Volume | cubic meter |
| Density | kilogram per cubic meter |
| Work | joules |
| Energy | joules |
| Force | newtons |
| Speed | velocity |
| Acceleration | meter per second |
| Time | second |
| Temperature | kelvin |
Created by:
nikitalemmon
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