One way in which scientists learn about how nature works is to conduct a controlled experiment.To begin, scientists isolate variables,or factors that can change within a system or situation being studied.An experiment involving single-variable analysis is designed to isolate and study the effects of one variable at a time.


科學家從一種方式得知自然工作是如何去引導一個被控制的實驗。開始，科學家隔絕可能在被研究的系統或情況之內改變的可變因素或要素。實驗包含單一的可變因素分析並且被設計去隔絕同時研究一種變因的結果。