* Observation: This is the initial step where you gather information about the world around you. It doesn't involve stating relationships or explanations.

* Law: A scientific law describes a consistent pattern or relationship in nature. It doesn't explain *why* the relationship exists, but rather simply states that it does. For example, the Law of Gravity describes the attraction between objects with mass, but it doesn't explain the underlying mechanism of that attraction.

* Theory: A scientific theory provides a well-substantiated explanation for a phenomenon. It's supported by a large body of evidence and can be used to make predictions. Theories do explain the "why" behind observations.

* Hypothesis: A hypothesis is a testable prediction about the relationship between variables. It's a proposed explanation that can be tested through experiments.

In summary: Laws describe relationships, but they don't explain them. Theories provide explanations for those relationships.