Final answer:
The search pattern used on exterior scenes over uneven terrain is a grid search pattern, where the area is divided into a grid and systematically searched.
Step-by-step explanation:
The search pattern used on exterior scenes over uneven terrain is called a grid search pattern. In this pattern, searchers divide the area into a grid and systematically search each grid cell. This is done by walking along the grid lines and searching the area within each cell.
For example, if an area is divided into a 10x10 grid, searchers would start at one corner of the grid and search each cell in a systematic manner, covering the entire area. This pattern is used in search and rescue operations, archaeological surveys, and other fieldwork where thorough coverage of an area is required.