Abstract
This article develops the concept of risk competence as a necessary component of contemporary media competence. Risk competence is understood as the ability to recognise uncertainty reflexively and either to transfer it into expert knowledge or to cope with it by resorting to heuristics. Against the background of a diagnosis of the handling of "knowledge" in Web 2.0, the thesis is put forward that techniques and applications of Web 2.0 cause an increase in uncertainty. This must be taken up from the perspective of modern media education, for example in the conception of educational processes that use Web 2.0 techniques.
