I have to use the terms theory, hypothesis, controlled experiment, and variable in the same sentence.

well done.

Here is a better use of those terms.

A theory leads to a hypothesis, which can lead to a controlled experiment in which one or more variables are manipulated.

Did you know?

Did you know that in scientific research, a theory is an explanation that is backed by extensive evidence and has been repeatedly tested and verified? A hypothesis, on the other hand, is a proposed explanation for a phenomenon, which is yet to be tested or confirmed. To determine the validity of a hypothesis, scientists conduct controlled experiments, where they manipulate certain variables and closely observe the outcomes. Variables, in this context, refer to factors that can be altered or measured during an experiment to study their effects on the phenomenon being investigated. So, by conducting well-designed controlled experiments and analyzing variables, scientists strive to transform hypotheses into theories with solid evidence.