Experiments and Variables Flashcards
Variable
A quantity that can be precisely specified, often with a numerical value. For example, position and speed are variables or in math something that stands for an unknown.
Value
The particular number (with units) or choice that a variable may have.
Graph
A mathematical diagram showing one variable on the vertical (y) axis and the second variable on the horizontal (x) axis.
Independent Variable
In an experiment, a variable that is changed by the experimenter and/or causes changes in the dependent variable.
Dependent Variable
In an experiment, a variable that responds to changes in the independent variable.
Experiment
A situation specially set up to investigate relationships between variables.
Procedure
A detailed step-by-step description of how to perform an experiment. List the equipment and techniques used.
Data
Information collected during an experiment or other scientific inquiry. Data are often values of variables measured in an experiment.
Analysis
The process of evaluating data. Analysis may include thinking, creating graphs, doing calculations, and discussing ideas with others.
Conclusion
A statement of what was learned in an experiment or observation.
Experimental Variable
A variable that changes in an experiment.
Control Variable
A variable that is kept constant in an experiment.
Accuracy
Describes how close a measurement is to the true value.
Error
The difference between a measurement and the true value.
Average
A mathematical process in which you add up all the values, then divide the result by the number of values.
Assume the average is the true value.
