A geo probe is a tool that is used to gather soil samples and other data concerning geology and the environment. There are several other terms used to refer to this device. One of the most common is a soil probe, which is the general term for any tool that is used to collect soil samples. Another synonym that can be used is a soil auger, which refers to the specific type of tool that is used to drill into the ground and collect the sample. Some other terms used to refer to a geo probe include a soil corer, soil sampler, and soil drill, depending on the specific use case and the design of the device.