Cracked Plates & Tectonics Activity Source: Adapted with permission by Esri. In this activity, you’ll investigate dynamics in Earth’s crust that explain multiple Earth science phenomena. For the full activity, go to http://esriurl.com/ESW2016. Materials A computer/projector with internet connection Take these “tech tips.” Measure: At the top of the map, click the Measure button. Hover and click the Distance button. Click continuously along what you want to measure. Double-click to finish. [Read More]