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This is a lesson about remote sensing. Learners will investigate how much you can learn about something just by looking at it. In Activity 1, students study aerial photographs to identify geologic features, determine how they differ from one another, and examine the processes involved in their formation. In Activity 2, students investigate how remote observations of a planetary surface can be used to create geologic maps. By the end of the lesson, students will understand how data gathered by spacecraft can not only be used to investigate the properties of an object, but also how it was formed, how it has evolved over time, and how it is connected to other objects nearby.