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PS Semester 1 Test
| Question | Answer |
|---|---|
| factor that changes as a result of changes in the other variable | Dependent Variable |
| factor that, as it changes, affects the measure of another variable | Independent Variable |
| in an experiment, 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 from many observations and investigations | Theory |
| statement about what happens in nature that seems to be true all the time; | Scientific law |
| rate of change of 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 |
| Newtons first law of motion | |
| states that the acceleration of an object is in the same direction as the net force on the object | Newtons second law of motion |
| states that when one object exerts a force on a second object | 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 | Kinetic energy |
| stored energy a object has due to its position | 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 output work done by the machine to the input work done on the machine, expressed as a percentage | Efficiency |
| ratio of the output 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 heat flows slowly | 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 |
| meter/m | Length |
| kilogram/Kg | Mass |
| G/CM^3 | Density |
| joule/J | Work |
| joule/J | Energy |
| newton/N | Force |
| meter per second/M/S | Speed |
| meter per second squared/M/2S | Acceleration |
| second/S | Time |
| kelvin/K | Temperature |
| 1.start problem 2.gather info 3.form a hypothesis 4.test hypothesis 5.analyze data 6.draw conclusion | Scientific method |
Created by:
TonyC
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