Happy Planet Week! Did you know the Earth’s outer layer has big rocky sheets called tectonic plates that move back and forth up to six inches every year? As they move, these wiggly jiggly plates can create mountain ranges, cause volcanoes to erupt, and sometimes trigger earthquakes! But do other planets have tectonic plates, too? We asked geologist Yesenia Arroyo to help us find the answer.

Got a question shifting around in your brain? Send it to us at BrainsOn.org/contact, and we’ll plate up the answer!