Here's a breakdown of why that's the case:

* General set of principles: Scientific theories are not just isolated facts but interconnected ideas that explain a broad range of phenomena.

* Supported by a large body of scientific evidence: This evidence comes from experiments, observations, and data analysis. It's not just a hunch or a single piece of evidence.

* Explains some aspect of nature: Theories aim to provide a comprehensive understanding of how things work in the natural world.

Examples of Scientific Theories:

* Theory of Evolution: Explains the diversity of life on Earth through natural selection.

* Theory of Relativity: Explains gravity and the relationship between space, time, and mass.

* Cell Theory: States that all living organisms are made up of cells.

Important Note: Scientific theories are constantly being refined and updated as new evidence emerges. They are not absolute truths but the best current explanations we have based on the available evidence.