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PS ch1


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
Created by: merariramos1