Conceptual modeling involves the understanding and communication between system analysts and end-users. Concept maps (CM) are informal, semantic, node-link conceptual graphs used to represent knowledge in a variety of applications. Concept maps capture knowledge about the concepts and concept relationships in a domain, using a two-dimensional visually-based representation. In this paper we examine hoe concept maps created for student requirements are different from that of a domain expert. This will aid us as analysts, to understand how well we interpret requirements in known and unknown domains using two requirements eliciting methods problem description and use case method. The results show as that we tend to have more simple and modular requirements in known domain regardless of the method used and have more complex set of requirements in unknown domains.