It's not accurate to say science has just two parts. It's more helpful to think of science as a process with many interconnected elements. Here are two broad categories that encapsulate the core aspects of science:

1. Scientific Inquiry: This is the process of asking questions, observing, experimenting, and collecting data. It involves:

* Observation: Noticing patterns and phenomena in the world around us.

* Hypothesis: Formulating testable explanations for those observations.

* Experimentation: Designing and conducting controlled tests to gather evidence.

* Analysis: Interpreting the results of experiments and drawing conclusions.

* Communication: Sharing findings with the scientific community and the public.

2. Scientific Knowledge: This refers to the body of accumulated facts, theories, and laws that have been established through scientific inquiry. It includes:

* Empirical evidence: Data and observations that support scientific claims.

* Scientific theories: Well-substantiated explanations of natural phenomena, supported by a large body of evidence.

* Scientific laws: Generalizations about how things work in the natural world, often expressed as mathematical equations.

These two categories, scientific inquiry and scientific knowledge, are interconnected and mutually reinforcing. Scientific inquiry generates new knowledge, which in turn informs further inquiry.