Video Description:  Volcanoes play a role in how Earth looks today. Thanks to NASA's missions, we know more about volcanoes in our solar system. Studying volcanoes can teach us about the interior properties of the planets and moons. Learn how the slope equation is used to identify how a volcano was formed.  Video Length:  4:46.NASA eClipsTM is a suite of online student-centered, standards-based resources that support instruction by increasing STEM literacy in formal and nonformal settings.  These free digital and downloadable resources inform and engage students through NASA-inspired, real-world connections.NASA eClips Real World segments (grades 6-8) connect classroom mathematics to 21st Century careers and innovations.  They are designed for students to develop an appreciation for mathematics through real-world problem solving.