Citizen Science projects are continuously growing in popularity as they offer a unique possibility to conduct large-scale research projects as well as allow citizens to broaden their knowledge about the research topic or the process of scientific investigations. However, the benefits for participants vary, depending on the way and the amount of…

Simple, often artificial problems are normally preferred for introductory lab courses and are restricted to indoor participation. Microtitrations make it possible to leave the lab and study water chemistry directly in the natural environment. An exemplary outdoor challenge is presented here: travertine formation is context-rich, has to be examined…