Exploring Seafloor Topography
DATA: Digital Elevation Model Data. TOOL: GeoMapApp. SUMMARY: Explore a timeline about how we have learned about the oceans. Construct a profile across the Atlantic Ocean and create 3-D visualizations of the seafloor.

Life in Extreme Environments
DATA: Global Multi-Resolution Topography Data and NSF Ridge 2000 Data. TOOL: GeoMapApp. SUMMARY: Create topographic profiles of the ocean floor to explore the structure of a spreading center. Learn about the life forms found in these extreme environments and investigate the conditions affecting them.