Here are some more specific terms related to the study of the natural world:

* Natural science: A broad term encompassing the study of the physical world, including biology, chemistry, physics, astronomy, and geology.

* Life science: Focuses on living organisms, including biology, zoology, botany, and ecology.

* Physical science: Focuses on the non-living world, including physics, chemistry, astronomy, and geology.

* Earth science: Studies the Earth's systems, including geology, meteorology, oceanography, and climatology.

Do you have a particular aspect of the natural world you'd like to learn more about?