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PS ch1
Vocab
Term | Definition |
---|---|
scientific method | organized set of investigation procedures that can include stating a problem, forming a hypothesis, researching, and gathering information, testing a hypothesis analizing data, and drawing conclusions |
hypothesis | a educated guess using what you know and what you observe |
experiment | organized procedure for testing a hypothesis; tests the effect of one thing on another under controlled conditions |
variable | a factor that can cause a change in the results of an experiment |
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 | in an experiment, a variable that does not change when other variables change |
control | standard used for comparison of test results in an experiment |
bias | occurs when a scientis's expectations change how the results of an experiment are viewed |
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 |
theory | explanation of things or events that is based on knowledge gained from many observations and investigations |
scientifc law | statement about what happens in nature that seems to be true all the time;j does not explain why or how something happens |
technology | application of science to help people |