Here's a breakdown:
* Scientific Theory: 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 is a well-tested and widely accepted explanation, but it is always open to further refinement or revision as new evidence emerges. Examples include the theory of evolution, the theory of relativity, and the germ theory of disease.
* Scientific Law: A statement that describes an observed pattern in nature, often expressed mathematically. Laws are generally considered to be universal and unchanging, but they don't explain why things happen. They simply describe how things happen. Examples include Newton's Law of Universal Gravitation, the Law of Conservation of Energy, and the Law of Conservation of Momentum.
In summary:
* Theories explain why things happen.
* Laws describe how things happen.
So, theories don't "become" laws. They serve different purposes in scientific understanding.
Important Note: Sometimes, the word "law" is used informally in science to refer to a well-established theory. This can be confusing, but it's important to remember the distinction between the formal definition of a scientific law and the informal use of the word.