Where have you used the term phase in this class?

In this class, the term "phase" has been used to describe distinct stages in various processes, such as the phases of matter (solid, liquid, gas) or phases in project management (planning, execution, closure). Additionally, we've discussed phases in the context of the learning process, where students progress through different phases of understanding and skill development. Lastly, the term has also been applied to describe phases of a scientific experiment, indicating the progression from hypothesis to data collection and analysis.