Geology: The scientific study of the origin, history, and structure of the earth.

The structure of a specific region of the earth’s crust.

A book on geology.

The scientific study of the origin, history, and structure of the solid matter of a celestial body.

Biology: The science of life and of living organisms, including their structure, function, growth, origin, evolution, and distribution. It includes botany and zoology and all their subdivisions.

The life processes or characteristic phenomena of a group or category of living organisms: the biology of viruses.

The plant and animal life of a specific area or region.