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This is an activity about creating impacts on sandy surfaces. Learners will use trays of sand and a variety of solid objects to model the effects of "impactors" on the surface. This is activity 6 of 9 in Mars and Earth: Science Learning Activities for After School. Note: The Mars image set that is needed to do this activity is on p. 37 of the guide (see Related & Supplemental Resources to the right).
This resource is located on page 23 of the PDF document.