What is the difference between a Normal Fault, a Reverse Fault, and a Strike-Slip Fault?

Normal Faults and Reverse Faults are "Dip-Slip" Faults - they experience vertical movement, in line with the dip of the fault. They are identified by the relative movement of the Hanging Wall and Foot Wall.

In a Normal Fault, the hanging wall moves downwards relative to the foot wall. They are caused by extensional tectonics. This kind of faulting will cause the faulted section of rock to lengthen.

In a Reverse Fault, the hanging wall moves upwards relative to the foot wall. They are caused by compressional tectonics. This kind of faulting will cause the faulted section of rock to shorten.

A Strike-Slip fault experiences lateral motion - movement is horizontal, along the line of the strike of the fault. They can be defined as Sinistral (the walls move to the left relative to one another) or Dextral (the walls move to the right relative to one another).