Geology is a branch of Earth science concerned with both the liquid and solid Earth, the rocks of which it is composed, and the processes by which they change over time. Geology can also include the study of the solid features of any terrestrial planet or natural satellite such as Mars or the Moon.

What geologists do?

Geologists study the materials, processes, products, physical nature, and history of the Earth. Geomorphologists study Earth's landforms and landscapes in relation to the geologic and climatic processes and human activities, which form them.

What is the simple definition of geologist?

If you're fascinated by rocks and spend hours digging for interesting samples in the backyard, you might be a budding geologist, a scientist who studies all things related to the Earth. A geologist is an expert in the field of geology, the study of what the Earth is made of and how it was formed.