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In this activity, students will identify, compare and contrast multiple geo-referenced Earth data sets, and understand that Global Information Systems (GIS) are composed of geo-referenced data layers. Students compare ocean buoy data with satellite data. Step-by-step instructions for use of the MY NASA DATA Live Access Server (LAS) guide students through selecting a data set, importing the data into a spreadsheet, creating graphs, and analyzing data plots. The lesson provides detailed procedures, related links and sample graphs, follow-up questions, extensions, and teacher notes. Designed for student use, MY NASA DATA LAS samples micro datasets from large scientific data archives, and provides structured investigations engaging students in exploration of real data to answer real world questions.