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This Concept Map, created with IHMC CmapTools, has information related to: Mars, The cooling of the Core Caused by Radioactivity Stopped, Tectonic Activity (Tectonic Plates) Evidence Magnetic Stripes, Tectonic Activity (Tectonic Plates) Once had Mars, Earth has these features as well They are The definitive signature of plate tectonics on Earth, Radioactivity Stopped Meaning All the unstable atoms/nulceus became stable, Magnetic Stripes Because Earth has these features as well, Tectonic Activity (Tectonic Plates) no longer does due to The cooling of the Core