* Scientific Theory: A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experimentation. It's a comprehensive explanation, not a single experiment.

* Controlled Experiment: A controlled experiment is a scientific test where a variable is manipulated to observe its effect on another variable. It's a specific, repeatable test designed to isolate and test a hypothesis.

Think of it this way:

* A theory is like a house. It's built upon a strong foundation of many bricks (experiments and observations).

* A controlled experiment is like a single brick. It contributes to the building of the theory.

Examples:

* Theory: The Theory of Evolution explains how life on Earth has changed over time. It's supported by a vast amount of evidence from fossils, genetics, and observations of natural selection.

* Experiment: A scientist might design an experiment to study the effects of a new fertilizer on plant growth. This experiment would contribute to the understanding of plant biology, which could be part of a larger theory about plant growth and development.

In summary:

* Scientific theories are broad explanations based on multiple lines of evidence.

* Controlled experiments are specific tests designed to test a single hypothesis.

They are interconnected, but not the same thing.