| A | B |
|---|
| model | can be used to represent an idea, object, or event that is too big, too small, too complex, or too dangerous to observe or test directly. |
| hypothesis | educated guess using what you know and what you observe. |
| density | mass per unit volume of a material. |
| graph | visual display of information or data that can provide a quick way to communicate a lot of information and allow scientists to observe patterns. |
| independent | factor that changes as a result of changes in the other variables. |
| mass | amount of matter in an object. |
| scientificmethods | organized procedure for testing a hypothesis; tests the effect of one thing on another under controlled conditions. |
| theory | explanation of things or events that is based on knowledge gained from many observations and investigations. |
| dependent | factor that, as it changes, affects the measure of another variable. |
| volume | amount of space occupied by an object. |
| control | standard used for comparison of test results in an experiment. |
| scientificlaw | statement about what happens in nature that seems to be true all the time; does not explain why or how something happens. |
| technology | application of science to help people. |
| precision | describes how closely measurements are to each other and how carefully the measurements were made. |
| variable | factor that can cause a change in the results of an experiment. |
| experiment | organized set of investigation procedures that can include stating a problem, forming a hypothesis, researching and gathering information, testing a hypothesis, analzying data, and drawing conclusions. |
| constant | in an experiment, a variable that does not change when other variables change. |
| accuracy | compares a measurement to the real or accepted value. |
| bias | occurs when a scientist's expectations change how the results of an experiment are viewed. |
