Here's a breakdown:

* Geo: Relating to the Earth.

* Morph: Refers to form or shape.

* -ology: The study of.

Geomorphologists study the Earth's landforms, including:

* Mountains: How they are formed, their evolution, and the processes that shape them.

* Valleys: The different types of valleys and how they are created by rivers, glaciers, and other forces.

* Rivers and Lakes: The flow of water, erosion, and deposition.

* Glaciers: The movement of ice and the impact on the landscape.

* Coastal Areas: The interaction of land and ocean, including erosion, deposition, and the formation of beaches.

They use a variety of methods, including:

* Fieldwork: Observing landforms and collecting data.

* Remote Sensing: Using satellite imagery and aerial photographs to study the Earth's surface.

* Geographic Information Systems (GIS): Analyzing spatial data and creating maps.

* Laboratory Analysis: Examining samples of rocks, soils, and sediments.

Geomorphologists play an important role in understanding the Earth's history, predicting future changes in the landscape, and mitigating natural hazards.