In this 6-7 day investigation, learners begin with an introduction to seamounts that are present in the Gulf of Alaska. They learn how seamounts were formed and look at a bathymetric map of a seamount. In Activity 3A, learners explore sea floor mapping techniques as they participate in an activity to create a map of a sea feature they have molded out of clay. In Activity 3B, learners watch a short animated presentation, "Who cares about Sea Floor Mapping?" and create a model of a seamount found in Alaska. They use pre-sonar techniques to collect data and create a graph of their seamount using Excel. This detailed lesson plan includes learner hand-outs, evaluation questions, curricular connections, and tips.