Here's why:
* Hypothesis: A proposed explanation for a phenomenon, based on limited evidence. It's a testable prediction that can be supported or refuted through further investigation.
* 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's a more established and comprehensive understanding compared to a hypothesis.
Essentially, a hypothesis is the starting point for scientific inquiry, while a theory is the result of rigorous testing and validation.