| A | B |
|---|
| Technology | the practical use of scientific information. |
| Physical Science | the study of matter and energy. |
| Model | an idea, system, or structure that repreasents whatever you're trying to explain. |
| observation | using your senses to gather information. |
| hypothesis | a testable prediction |
| theory | an explaination based on many observations supported by experimental results. |
| scientific law | a rule of nature that sums up related observations and experimental results to describe a pattern in nature. |
| experiment | an organized procedure for testing a hypothesis. |
| control | a standard for comparison |
| constant | a factor tht doesnt vary in an experiment |
| independent variable | the factor adjusted by the experiment |
| dependent variable | a factor whose valuee depends upon the value of the independent variable. |
| Standard | an exact quantity that people agree to use for comparison. |
| SI | International system of Units |
| Meter | the SI base unit of length |
| Volume | the amount of space occupied by an object |
| derived unit | units obtained by combining SI units. |
| liter | occupies the same volume as a cubic decimeter (dm3) |
| mass | a measurement of the matter in an object. |
| kilogram | the SI unit of mass |
| density | the mass per unit volume of a material. |
| time | the interval between two events. |
| second | the SI unit for time. |
| kelvin | the SI unit of temperature. |
| graph | a visual display of information or data. |
| speed | change over time. |
| instantaneous speed | is the rate of motion at any given instant. |
| constant speed | a speed that does not vary. |
| average speed | the total distance traveled divided by total time of travel. |
| velocity | describes both speed and direction of an object. |
| acceleration | the rate of change of velocity. |
| force | a pus or a pull on body exerts on another. |
| balanced forces | forces on an object that are equal in size and opposite in direction. |
| net force | an object always changed the velocity of the object. |
| inertia | the tendency of an object to resist any change in its motion. |
| friction | the force that opposes motion between two surfaces that are touching each other. |
| gravity | every object in the universe exerts a force on every other object, the force is gravity. |
| weight | the measure of the force of gravity on an object is the object's weight. |
| Newton's second law of motion | says that a net force actiing on an object causes the object to accelerate in the direction of force. |
| air resistance | the force air exerts on a moving object |
