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This is a lesson about using craters to indicate the age of a planetary surface. Learners will simulate the process of cratering by using falling water drops to make craters in fine silica sand. Then, they will compare the cratered surfaces they produce with pictures of the surface of Mars. As an extension, learners will examine a more complex Mars image and apply what they have learned about Mars to the analysis of the surfaces of other worlds. This is Actividad 3.7 as part of El Universo a Sus Pies, a Spanish-language curriculum available for purchase.
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