What is a theory? What is a hypothesis? What is a variable?

A theory is a coherent collection of generally accepted propositions and tested general hypotheses; a theory is generally accepted as true and can be used to explain new data and phenomena. A hypothesis is a proposed explanation for a given (and simple) phenomenon.

In a scientific experiment, a variable is a data point or condition that can be controlled.

A theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and can be tested and refined through observation and experimentation.

A hypothesis is a specific, testable prediction about what will happen in a given set of circumstances. It is often formulated based on prior observations or theoretical considerations and serves as a basis for making predictions and conducting experiments.

A variable is any factor, trait, or condition that can exist in differing amounts or types. In scientific research, variables are typically divided into independent variables (which are manipulated or controlled) and dependent variables (which are observed or measured).