You may observe what the weather looks like through a window. You may go outside and see whether what you are wearing is warm or cool enough. Scientists use an orderly approach to learn new information and to solve problems. The methods scientists may use include observing to form a hypothesis, designing an experiment to test a hypothesis, separating and controlling variables, and interpreting data. Forming Operational Definitions Operational definitions define an object by showing how it functions, works, or behaves.
Some operational definitions explain how an object can be used.
A ruler is a tool that measures the size of an object. An automobile can move things from one place to another. Or such a definition may explain how an object works. A ruler contains a series of marks that can be used as a standard when measuring. An automobile is a vehicle that can move from place to place.