First step of scientific investigation

A scientific investigation often begins with a question or observation that can be explored with evidence. There is no single rigid first step used in every field, but a focused question helps guide the next choices.

How it works

Researchers review what is already known, define the problem, and develop a testable hypothesis or model when appropriate. They then choose methods that can produce evidence relevant to the question.

Example or application

A broad observation such as “plants differ in growth” can become a more focused question about how light exposure relates to growth under specified conditions.

Scope and limits

Scientific work is iterative. New evidence can change the question, and exploratory studies may begin without a formal hypothesis.

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