Is a compass a third class lever?

No, a compass is not a third-class lever. Levers are classified based on the relative positions of the effort (force applied), load (object being moved), and fulcrum (pivot point). In a third-class lever, the effort is between the fulcrum and the load. A compass, on the other hand, is a device that uses a magnetized needle to indicate direction and does not operate on the principles of levers.